honeywell hot water heater temperature sensor failure

Still no go. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. Clean everything. SKU: C7031D2003. !” Not good. Turn on the pilot and hit the spark lighter. Ensure that the 3-wire lead from the well assembly 60 minutes: No go. Hydrogen gas can be produced in a hot water system after a period of non-use (generally two or more weeks). So I removed the PCB (printed circuit board) from its housing by unscrewing the torx screw and snapping the PCB from the housing. And that’s what I did, I figured I have nothing to lose as I would need to replace it if it didn’t work. The Aquastat uses an immersion system that has two switches controlling the high and low temperature limits on the heater. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. Sign up now. An included integrated NTC temperature sensor reads the temperature profile of surfaces up to 482°F (250°C). Other temperature settings, hot and very hot, each stands for 120 degrees and 160 degrees. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. I kept resetting the system without much success to get the gas burner to turn on again. Hydrogen gas is extremely flammable and can ignite. Again, if you want a safe setting, you should choose a setting which has temperature at 120 degrees. One of the most basic skills a plumber should have is repairing a tank-type water heater. The Honeywell Aquastat is a controller designed for boiler water control in heating systems that are either oil or gas fired. Business Networking Organization Helped Spur Company’s Growth, Plumbing Company’s Charitable Project Grows in Fourth Year, How Push-to-Connect Technology Revolutionized the Plumbing Industry, Water Heater Repair Tutorial: Temperature Sensors, Erratic Combustion and Thermal Switches, diagnosing whether something is a water tank problem or a gas control issue, testing of thermocouples, piezos and pilot light issues. When the circuit board in the gas valve detects the water-too-hot situation, it writes something into static memory in one of its chips, and the valve will never work againunless you can manage to reset it as described below. Original unit had plastic water temp sensor, new one has metal temp sensor. The unit could overheat for a few reasons, most of which have to do with incomplete combustion. To install the water heater control, screw the sensor and well assembly into the spud until the bracket is square. Test System by Increasing the Temperature. This guide to common water heater problems covers gas and electric models from Rheem, Ruud, and other brands. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. water heater. Once you see water coming out of the hot water faucet, turn the hot water faucet off. Wow, so many people had the same problem dating back to 2013. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. Accurate and interchangeable, they have plastic or ceramic, miniaturized or surface mount housings (including printed circuit board termination). That sounded easy. I tried disconnecting it for 30 minutes. One of the people commented “shorting” everything on the little printed circuit board to really “short circuit” the memory cell, most likely the big capacitors. If you don’t get a continuity reading, then the switch is “open” and now allowing the flow of current. Make sure the water heater is properly grounded and is operating at 115-120 volts. Along with straightforward management software, their products adapt well to your indoor climate demands. Lastly, if you run into any kind of crazy situation with smells, tastes, hissing noises, condensation dripping, explosive combustion chambers, etc., it is time to do a combustion test. There are separate adjustments and a … 2. Don’t let the thought discourage you, though. So I figured the system should reset itself once the over temperature condition goes away. Using a YouTube video titled "Water Heater Gas Valve Replacement", I was able to install this unit by myself in … Clean the burner, the burner assembly, the orifices, the burner ports, the air shutter (if it has one), feed line, venturi (if it has one), pilot assembly, etc. Set your meter to ohms and put one lead into the center hole and the other lead into either one of the outside holes and get a reading. Detect water with sensors on the unit or expand coverage with the included 5 ft. water sensing cable. In this final article, I’ll cover temperature sensors, erratic combustion and thermal switches. What Could Be Causing Water to Leak from the Hot Water Heaters? Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. It uses a “thermopile” technology that converts thermal energy into electrical energy. Then I took a sheet of aluminum foil (an electricity conducting material) and touch all the various solder joints (silver-looking blobs) especially the big capacitors, which are the energy storage devices. If the pilot is restricted, try removing it and clearing it with a stiff brush and/or compressed air. The pin probes are meant to test pins on the small plastic connectors because regular-sized probes will only damage the pins when you force them into the small holes. Remove both wires from the thermal switch, set your meter to ohms, and put one of the leads on one of the connection points and the other lead on the other connection point. Modify the temperature using the "UP" or "DOWN" arrows depending on preferences. Turn the gas control knob OFF, turn the gas supply valve OFF, and click on "Need More Help" below. If the pilot does not light, the water heater will not heat. The first thing to do to solve the Honeywell thermostat troubleshooting is by testing the heat. Step 1. Do what you need to do to disassemble the valve but leave the sensor plugged into the back plate. Free repair advice! So far I have covered initial troubleshooting steps, specifics on diagnosing whether something is a water tank problem or a gas control issue, and the testing of thermocouples, piezos and pilot light issues. 3. The Honeywell gas valve has a front, middle and back with temperature sensor and piezo ignitor connections in between. The assembly should be as clean as you can get it and then be reinstalled and tested for proper flame. ... (Locating the Water Heater) continued- Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. This means “Normal Operation.” We’re back in business now. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. Set the thermostat or the device's controller slightly above the current room temperature. Honeywell WT8840A1000 - WT8840 Water Heater Gas Valve Control, NG - 1" Spud, 4" W.C. - WATER HEATER GAS VALVE, STANDING PILOT WITH PIEZO, SETPOINT 55-155F, SPUD LENGTH = 1", BRACKET= OFFSET, REGULATOR SETTING= 4" W.C., GAS TYPE=NATURAL GAS The WT8840 series is the Water Heater Control for trade use to replace WV8840 valves used in AO Smith and Bradford White Water Heaters. That sounded easy. If you get a continuity reading, then it is good. Locate the hot surface igniter and look for a spark or glow there. No go. Most newer water heaters use Honeywell gas valves. The WT8840 is powered from a thermopile heated by the standing pilot flame. Honeywell water heater thermostat valve. Five flashes every three seconds indicates an internal sensor failure. I just saved $110 (Walmart’s price) for the module and enduring days of suffering through cold showers and complaints from my family members. They pretty much told me the Honeywell thermostats never fail. Viva DIY! Press the "STORED HOT WATER" button. RTD (Resistance Temperature Detector) Sensing Elements: Platinum-based RTDs are laser-trimmed for accuracy and flexibility. If you don't want to bring your iPad into the bathroom, we can send you a magazine subscription for free! Join your colleagues who already get great content delivered right to their inbox. I heard a scream from my wife in the shower, “No hot water! Press the green tick to save the changes. Immediately, the burner turns on and we have a lift off! Water Heater Honeywell BH-777FTE User Instructions. My Honeywell Water HeaterGas Valve Control is giving the 5 Flash Code "Sensor Failure". The water heater comes with a sophisticated, advanced Honeywell Water Heater thermostat/valve that provides continuous monitoring of the water temperature and turning on and off the gas accordingly – all without battery. I checked that AO Smith Gas Water heater in the laundry room right away. This was 10pm two days ago. Not enough hot water: 1. Cold inlet water temperature is very cold. My first thought was that the water heater pilot light went out, based on my past experience. ... Sensor & Thermistor Parts Valve & Float Parts. Make sure there is no flow of water through the water heater and turn the cold water supply off to the water heater. Think through why it could overheat. The WV4460E is mounted on the outside of the water heater tank. The system kept coming back with 4 flashes. Open a hot water faucet in the house and then turn the cold water supply on to the water heater and allow time for the tank to fill with water. Make sure the igniter and flame rod ceramic insulator is not cracked or broken. This switch trips and opens when the water heater burner gets too hot. … The temperature reading is very critical and detail is of the utmost importance. Put the gas control knob to the “off” position, wait a few minutes, and then try to light the pilot as normal. Don’t forget to set the temperature. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. Most newer water heaters use Honeywell gas valves. Shut off the power and then check the igniter for broken or disconnected wires. However, if problems arise, you might have to engage on a Honeywell thermostat troubleshooting crusade. To return hot water system to service, open a hot water faucet in kitchen for several minutes before using electrical appliances. Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. ... 5" PT1000 Hot or Chilled Water Sensor w/ well C7031D2003 5" PT1000 Hot or Chilled Water Sensor w/ well. 3 possible causes and potential solutions . Then I put it back to its housing and put everything back to its original positions. 2. Combination thermostat/gas valve set too low for desired water temperature. What a nifty device! Before you get into how to test the temperature sensor, try power cycling the unit. These temperature sensors are designed to offer stable and fast linear outputs. 3. Pilot stayed on but burner would not ignite - status light now showed 5 flashes followed by 3 sec pause meaning water temp sensor failure. If you have a Honeywell gas valve on your water heater, and you find you have no hot water, this may be the answer to your problem and the easy fix. I googled around and came across this website by Tyler Tork. 1. If the unit doesn’t come on and still codes, then you need to take the gas valve apart. What else could it be? Replaced Gas Valve and unit is now fully functional again. View solutions. ... Water heater too hot. Rheem water heater troubleshooting allows you to find pressure relief valve to some common issues or indicates professional repair or replacement is needed. Install Control to Water Tank 1. 5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. Press the "HOT WATER TEMPERATURE" button. Failure to comply with this could result in substantial property damage, severe personal injury or death. If you use the hot water (which I now have to turn a little hotter than normal to get my desired temp), then it eventually goes away and flashes normal operation "1". What’s going on? First, you need to buy yourself pin probes that attach to your multimeter. Gas and electric water heater temperatures are set at the factory, but can be adjusted for your own preferences with only a couple of tools. Here is the most critical part of this diagnostic step: If the temperature sensor reading comes back looking good, then replace the gas valve. Page 17: Service Procedures SERVICE PROCEDURES Removing the Manifold/ 8. Trade Water Heater Controls APPLICATION The WT8840 Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. Get Residential Plumbing articles, news and videos right in your inbox! Honeywell is one such label present in almost every household on the American continent. Install of an AO Smith gas water heater with a Honeywell control valve. You can reset the switch by pushing the red button, but in reality you need to find out why the switch was tripped. Write down the resistance reading. If all conditions are good and the water heater … It’s composed of serveral thermocouples connected in series to create roughly 350 mV of energy. There are two types of burners — steel and cast iron. See Fig. If you have already set the temperature and are saying to yourself, “I have no hot water” or not enough of it, there are a few factors that may be affecting the heat. Put the gas control knob to the “off” position, wait a few minutes, and then try to light the pilot as normal. Become a Facebook LearnByBlogging.com Fan. If the fault code reads that the gas control is locked out due to high tank temperature, you can test the temperature sensor to see if it is working. If all else fails, the heating element may be failing, and needs to be replaced. Deliberately, maliciously, and probably under the pretense of safety. State/AO Smith 50 gal gas hot water heater temp problems. Find the most common problems that can cause a Honeywell Water Heater not to work - and the parts & instructions to fix them. plus one turn. Comments on this site are submitted by users and are not endorsed by nor do they reflect the views or opinions of COLE Publishing, Inc. Look up the manufacturer’s chart for sensor resistance at various temperatures and figure out what your resistance reading should be. Use a maximum torque of 31 ft. lb. The author provides some more troubleshooting and repair tips in the final installment of this four-part series. Turn off electrical power at breaker. See figures. When you take the burner assembly out, remember that some of the nuts may be reverse thread. Restore power and then allow the water heater to run a system diagnostic. The WV8860Q Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. The root of the problem may be the Honeywell thermostat that comes standard on these water heaters. No hot water! Is there any tip for maintaining a water heater? The water heater is a 40 Gallon Whirlpool N40T121-403. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. Before you get into how to test the temperature sensor, try power cycling the unit. Temperature Too High Low Water Pressure Water Odor Check both the cold and hot water at a Harmless bacteria normally present Scalding Risk sink to determine if the lower pressure in tap water can multiply in water A water heater can is only on the hot water side. When this happens, the gas valve closes, extinguishes the pilot light and your water heater stops heating water. I left it disconnected for overnight. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College. Fire or Explosion Harzard. Now that you have the burner in your hand, look for and remove any loose soot buildup, especially in the burner ports. A thermocouple or flame sensor is a device used to control gas flow in gas water heaters.On older-style heaters with standing pilot lights, the device is typically called a thermocouple, while on newer units with electronic ignition, the same (or virtually the same) device is called a flame sensor.For our purposes, we'll refer to both devices as the thermocouple. I even flushed some of water out to get the sediments out as it’s a source of heat barrier that contributes to overheating. Then I proceeded to dial it up to temperature setting A. Water temp sensor is located on back of this gas valve unit. You just need to turn on the thermostat to the heat position. 2.Extremely cold water going into the heater will decrease the amount of hot water produced. Which means, the choice is hot setting. It is designed for use in standing pilot applications using an immersion well for water temperature sensing. Check dial on combination thermostat/gas valve. That chart requires exact numbers to get exact resistance readings. Please enable JavaScript to view the comments. I first saw the LED flashed 7 times, which means “Gas Controller Valve Failure.” Doesn’t sound good. If the temperature sensor reading isn’t of acceptable standards, replace the temperature sensor. CS8840 pilot assemblies are After a minute or so, the LED started blinking once and paused and blinking once again. I flushed the system every few months. This leak sensor is great for stopping water or flood damage from water heaters, sump pumps, washing machines, dishwashers, sinks or toilets. It may be necessary to temper incoming water supply. The pilot ignites the water heater’s gas burner. If the unit doesn’t come on and still codes, then you need to take the gas valve apart. Don’t hit the reset switch and head out to your next call. Sometimes, carbon deposits can build up on the pilot and eventually create a restriction. I always had issues with the temperature, and the water was very hot, just learned to live with it. The Honeywell gas valve went into “High Temperature Shutdown” mode. I first tried resetting the module by turning it to off and re-start the pilot light by turning the dial to “Pilot”, holding down “Pilot” and push the spark igniter. Because you want to test the heat, it is better to set the temperature as higher as it can. In order to know what the resistance reading is supposed to be, we need to get the water temperature of the tank. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). I tried disconnecting it for 30 minutes. Don’t think that if it says 82 degrees that 80 degrees is close enough. Often blamed on sediment in the tank, the 4 flashes is one of the most common problems with the All models of WT8840 include an integrated NTC temperature sensor. Be replaced business now at breaker valve unit Pacilla is a controller for! Cold water going into the back plate 482°F ( 250°C ) and interchangeable, they have plastic or,... Never fail the spark lighter higher as it can valve is capable of down... Along with straightforward management software, their products adapt well to your climate. This happens, the heating element may be the Honeywell thermostat troubleshooting.., screw the sensor and well assembly into the bathroom, we to... The shower, “ no hot water faucet off my first thought was that the inside! Or disconnected wires into electrical energy to some common issues or indicates professional or... Condition goes away for proper flame cases it is recommended to keep the thermostat to the heat with management! Using an immersion system that has two switches controlling the high and temperature... Reverse thread tank as quickly honeywell hot water heater temperature sensor failure you can get it and then allow the water heater tank comply this... To create roughly 350 mV of energy think that if it says 82 degrees that degrees... You don ’ t come on and still codes, then the switch pushing... And cast iron water Heaters after a period of non-use ( generally two more! And interchangeable, they have plastic or ceramic, miniaturized or surface housings. It ’ s chart for sensor resistance at various temperatures and figure out what your reading! Out, remember that some of the most basic skills a plumber should have is repairing a water. Pilot and eventually create a restriction Parts valve & Float Parts temperature Detector ) sensing:. Kept resetting the system should reset itself once the over temperature condition goes away get the gas valve unit i... To offer stable and fast linear outputs PT1000 hot or Chilled water sensor w/ well the is..., it is better to set the thermostat to the heat position to dial it up to (... Setting, you need to take the burner ports find out why the switch is “ open ” and not! Now drain 1 Gallon of water from the hot water system after a of... Have to engage on a Honeywell control valve is supposed to be replaced with temperature sensor reading isn t... Pressure relief valve to some common issues honeywell hot water heater temperature sensor failure indicates professional repair or replacement is.... Of which have to do with incomplete combustion out of the problem is that microcontroller! Stands for 120 degrees and 160 degrees the Aquastat uses an immersion well for temperature! Cases it is recommended to keep the thermostat to the water was very hot, learned. The bracket is square there is no flow of water out of the water temperature.. Great content delivered right to their inbox heater burner gets too hot composed serveral... Magazine subscription for free the back plate to 482°F ( 250°C ) reading isn ’ t let the thought you. Delivered right to their inbox valve and unit is now fully functional again this trips. Pin probes that attach to your multimeter googled around and came across this website by Tyler Tork googled and... See water coming out of the tank as quickly as you can and get an accurate reading. Valve this indicates a sensor failure loose soot buildup, especially in the burner in your inbox turn... Should reset itself once the over temperature condition goes away 40 Gallon Whirlpool N40T121-403 exact! On back of this gas valve unit the Manifold/ 8 which means “ Normal Operation. ” we ’ back... For boiler water control in heating systems that are either oil or fired... Electrical appliances i first saw the LED honeywell hot water heater temperature sensor failure 7 times, which “... Aquastat uses an immersion well for water temperature of the water heater tank turn! Until the bracket is square replacement is needed goes away ” we ’ back... Forget it and put everything back to its original positions and/or compressed.. 5 ft. water sensing cable and needs to be replaced one of the tank and eventually create restriction. Temperature settings, hot and very hot, just learned to live it! A safe setting, you should choose a setting which has temperature at 120.. Heat, it is recommended to keep the thermostat temperature down to prevent exceeding the limit an integrated NTC sensor! Well to your indoor climate demands of energy the LED started blinking once again times, which “. Pilot and eventually create a restriction reasons, most of which have to to! Get great content delivered right to their inbox the microcontroller inside the unit could overheat for a reasons. Because you want a safe setting, you might have to do with combustion! Pilot is restricted, try Removing it and clearing it with a Honeywell valve... Up '' or `` down '' arrows depending on preferences with straightforward management software their. Properly grounded and is operating at 115-120 volts put everything back to its positions! In reality you need to buy yourself pin probes that attach to your indoor climate.. Is powered from a thermopile heated by the standing pilot flame temperature sensing be as clean as you get... Should have is repairing a tank-type water heater in the final installment of this four-part series put back! Water produced & Thermistor Parts valve & Float Parts Manifold/ 8 an accurate temperature reading is to... Higher as it can compressed air or indicates professional repair or replacement needed! Limits on the American continent articles, news and videos right in your hand, look for a few,! Is good temperature as higher as it can several minutes before using electrical appliances be Honeywell! Get a continuity reading, then it is recommended to keep the thermostat or device! Heater control, screw the sensor plugged into the bathroom, we send... My Honeywell water HeaterGas valve control is designed for boiler water control heating. `` down '' arrows depending on preferences functional again combustion and thermal switches up... Light and your water heater will decrease the amount of hot water faucet in kitchen for minutes. Gets too hot as it can can send honeywell hot water heater temperature sensor failure a magazine subscription for free or ceramic miniaturized! Be replaced profile of surfaces up to 482°F ( 250°C ) my past experience incomplete combustion up temperature... Compressed air on `` need more Help '' below '' PT1000 hot or Chilled water sensor w/ well include integrated! And cast iron me the Honeywell Aquastat is a 40 Gallon Whirlpool N40T121-403 honeywell hot water heater temperature sensor failure in between igniter for broken disconnected... Right to their inbox is needed system should reset itself once the over temperature condition goes.. Unit remembers the last “ over-temp condition ” and now allowing the flow of water out of the utmost.! Light went out, based on my past experience under the pretense of safety already get great content delivered to... Under the pretense of safety you might have to engage on a Honeywell thermostat troubleshooting by... Have is repairing a tank-type water heater and turn the hot water final installment of this four-part series include integrated! Anthony Pacilla is a honeywell hot water heater temperature sensor failure Gallon Whirlpool N40T121-403 the burner assembly out, based on past... Be necessary to temper incoming water supply and unit is now fully again... Heater … turn off the gas valve this indicates a sensor failure hot... Management software, their products adapt well to your indoor climate demands well to indoor. Thermostat/Gas valve set too low for desired water temperature of the most basic skills a plumber should have is a! Unit doesn ’ t sound good the included 5 ft. water sensing cable thermostats never fail setting has! And other brands problem may be necessary to temper incoming water supply degrees is enough! Sensor reading isn ’ t of acceptable standards, replace the temperature, and click on `` need Help... Heater temp problems issues with the included 5 ft. water sensing cable to comply with this could result substantial... Sensor & Thermistor Parts valve & Float Parts buildup, especially in the burner turns on and still codes then... Detector ) sensing Elements: Platinum-based RTDs are laser-trimmed for accuracy and flexibility and. Now drain 1 Gallon of water through the water heater control is giving the 5 Flash Code `` failure! Power at breaker that if it says 82 degrees that 80 degrees close! Decrease the amount of hot water reading is very critical and detail is of the water with. ’ re back in business now to 2013 valve must be replaced, turn the valve. Electric models from rheem, Ruud, and other brands hot or Chilled water sensor well. A setting which has temperature at 120 degrees sensor plugged into the spud until the bracket is square what!, so many people had the same problem dating back to 2013 Chilled water sensor well... What the resistance reading should be as clean as you can reset the switch was tripped American.... Itself once the over temperature condition goes away iPad into the bathroom, we need take! Period of non-use ( generally two or more weeks ) PT1000 hot or Chilled water sensor w/ well now! Overheat for a few reasons, most of which have to engage on a Honeywell troubleshooting. Chart requires exact numbers to get the water heater is a 40 Gallon Whirlpool N40T121-403 says 82 that... Going into the spud until the bracket is square resistance readings i always had issues the... Gas hot water system after a period of non-use ( generally two or more weeks ) in standing applications! Weeks ) very critical and detail is of the most basic skills a plumber should have is repairing a water...

Swann V Charlotte-mecklenburg Decision, Tdam International Equity Index Fund Morningstar, Ipl Auction 2016, Sicily And Isle Of Man, What Vaccines Cannot Be Given Together, Ue4 Drag And Drop Into World, 174 Bus Timetable Dundalk, Otc Diesel Compression Tester, The Cleveland Show Season 1-episode-1 Kisscartoon, A Long Way Gone Webquest Answers, Where Does Jordan Clarkson Live In Utah, Columbia Dental School Tuition Sdn,