honeywell hot water heater temperature sensor failure

Set the thermostat or the device's controller slightly above the current room temperature. I left it disconnected for overnight. Now that you have the burner in your hand, look for and remove any loose soot buildup, especially in the burner ports. Failure to comply with this could result in substantial property damage, severe personal injury or death. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. All models of WT8840 include an integrated NTC temperature sensor. The WT8840 is powered from a thermopile heated by the standing pilot flame. 2.Extremely cold water going into the heater will decrease the amount of hot water produced. One of the most basic skills a plumber should have is repairing a tank-type water heater. 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. Detect water with sensors on the unit or expand coverage with the included 5 ft. water sensing cable. Turn off electrical power at breaker. You can reset the switch by pushing the red button, but in reality you need to find out why the switch was tripped. It may be necessary to temper incoming water supply. Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. I tried disconnecting it for 30 minutes. My first thought was that the water heater pilot light went out, based on my past experience. Make sure the igniter and flame rod ceramic insulator is not cracked or broken. If you don't want to bring your iPad into the bathroom, we can send you a magazine subscription for free! Other temperature settings, hot and very hot, each stands for 120 degrees and 160 degrees. What else could it be? 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. I heard a scream from my wife in the shower, “No hot water! Before you get into how to test the temperature sensor, try power cycling the unit. The first thing to do to solve the Honeywell thermostat troubleshooting is by testing the heat. 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". ... Water heater too hot. ... (Locating the Water Heater) continued- Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. My Honeywell Water HeaterGas Valve Control is giving the 5 Flash Code "Sensor Failure". Use a maximum torque of 31 ft. lb. !” Not good. It’s composed of serveral thermocouples connected in series to create roughly 350 mV of energy. Don’t forget to set the temperature. If the pilot does not light, the water heater will not heat. Five flashes every three seconds indicates an internal sensor failure. 60 minutes: No go. Deliberately, maliciously, and probably under the pretense of safety. There are two types of burners — steel and cast iron. Replaced Gas Valve and unit is now fully functional again. Free repair advice! Step 1. 3. These temperature sensors are designed to offer stable and fast linear outputs. Accurate and interchangeable, they have plastic or ceramic, miniaturized or surface mount housings (including printed circuit board termination). Then I proceeded to dial it up to temperature setting A. ... 5" PT1000 Hot or Chilled Water Sensor w/ well C7031D2003 5" PT1000 Hot or Chilled Water Sensor w/ well. If all else fails, the heating element may be failing, and needs to be replaced. 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. In some cases it is recommended to keep the thermostat temperature down to prevent exceeding the limit. The Honeywell gas valve went into “High Temperature Shutdown” mode. 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. 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. Sign up now. I even flushed some of water out to get the sediments out as it’s a source of heat barrier that contributes to overheating. 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. I first saw the LED flashed 7 times, which means “Gas Controller Valve Failure.” Doesn’t sound good. Again, if you want a safe setting, you should choose a setting which has temperature at 120 degrees. Honeywell water heater thermostat valve. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. Immediately, the burner turns on and we have a lift off! 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. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. The system kept coming back with 4 flashes. This means “Normal Operation.” We’re back in business now. It uses a “thermopile” technology that converts thermal energy into electrical energy. 2. Locate the hot surface igniter and look for a spark or glow there. The WV4460E is mounted on the outside of the water heater tank. The temperature reading is very critical and detail is of the utmost importance. RTD (Resistance Temperature Detector) Sensing Elements: Platinum-based RTDs are laser-trimmed for accuracy and flexibility. Often blamed on sediment in the tank, the 4 flashes is one of the most common problems with the Restore power and then allow the water heater to run a system diagnostic. 2. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College. What’s going on? Think through why it could overheat. 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. This switch trips and opens when the water heater burner gets too hot. State/AO Smith 50 gal gas hot water heater temp problems. Hydrogen gas can be produced in a hot water system after a period of non-use (generally two or more weeks). If the unit doesn’t come on and still codes, then you need to take the gas valve apart. The Honeywell Aquastat is a controller designed for boiler water control in heating systems that are either oil or gas fired. Get Residential Plumbing articles, news and videos right in your inbox! 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. Most newer water heaters use Honeywell gas valves. 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. Using a YouTube video titled "Water Heater Gas Valve Replacement", I was able to install this unit by myself in … It is designed for use in standing pilot applications using an immersion well for water temperature sensing. I kept resetting the system without much success to get the gas burner to turn on again. The root of the problem may be the Honeywell thermostat that comes standard on these water heaters. After a minute or so, the LED started blinking once and paused and blinking once again. Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. There are separate adjustments and a … The WV8860Q Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. The recommended fix is to disconnect everything from the module for an hour and let the power dissipated to “flush” out the memory. This guide to common water heater problems covers gas and electric models from Rheem, Ruud, and other brands. If the pilot is restricted, try removing it and clearing it with a stiff brush and/or compressed air. What a nifty device! Don’t let the thought discourage you, though. This leak sensor is great for stopping water or flood damage from water heaters, sump pumps, washing machines, dishwashers, sinks or toilets. The water heater is a 40 Gallon Whirlpool N40T121-403. See figures. 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. 5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. 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. So I removed the PCB (printed circuit board) from its housing by unscrewing the torx screw and snapping the PCB from the housing. Become a Facebook LearnByBlogging.com Fan. No go. However, if problems arise, you might have to engage on a Honeywell thermostat troubleshooting crusade. 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. Don’t think that if it says 82 degrees that 80 degrees is close enough. ... Sensor & Thermistor Parts Valve & Float Parts. Most newer water heaters use Honeywell gas valves. Check dial on combination thermostat/gas valve. Test System by Increasing the Temperature. Please enable JavaScript to view the comments. Still no go. 1. If the temperature sensor reading isn’t of acceptable standards, replace the temperature sensor. I googled around and came across this website by Tyler Tork. 3 possible causes and potential solutions . 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. Don’t hit the reset switch and head out to your next call. Cold inlet water temperature is very cold. 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. Press the "STORED HOT WATER" button. To install the water heater control, screw the sensor and well assembly into the spud until the bracket is square. Sometimes, carbon deposits can build up on the pilot and eventually create a restriction. You just need to turn on the thermostat to the heat position. Modify the temperature using the "UP" or "DOWN" arrows depending on preferences. Do what you need to do to disassemble the valve but leave the sensor plugged into the back plate. Combination thermostat/gas valve set too low for desired water temperature. The pilot ignites the water heater’s gas burner. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. Then I put it back to its housing and put everything back to its original positions. First, you need to buy yourself pin probes that attach to your multimeter. Clean everything. … 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. They pretty much told me the Honeywell thermostats never fail. plus one turn. Along with straightforward management software, their products adapt well to your indoor climate demands. Rheem water heater troubleshooting allows you to find pressure relief valve to some common issues or indicates professional repair or replacement is needed. Make sure the water heater is properly grounded and is operating at 115-120 volts. Put the gas control knob to the “off” position, wait a few minutes, and then try to light the pilot as normal. Ensure that the 3-wire lead from the well assembly Here is the most critical part of this diagnostic step: If the temperature sensor reading comes back looking good, then replace the gas valve. So I figured the system should reset itself once the over temperature condition goes away. Once you see water coming out of the hot water faucet, turn the hot water faucet off. 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. If the unit doesn’t come on and still codes, then you need to take the gas valve apart. An included integrated NTC temperature sensor reads the temperature profile of surfaces up to 482°F (250°C). Turn the gas control knob OFF, turn the gas supply valve OFF, and click on "Need More Help" below. Fire or Explosion Harzard. See Fig. Press the "HOT WATER TEMPERATURE" button. 3. This was 10pm two days ago. In this final article, I’ll cover temperature sensors, erratic combustion and thermal switches. Which means, the choice is hot setting. The Aquastat uses an immersion system that has two switches controlling the high and low temperature limits on the heater. Water temp sensor is located on back of this gas valve unit. Viva DIY! To return hot water system to service, open a hot water faucet in kitchen for several minutes before using electrical appliances. Make sure there is no flow of water through the water heater and turn the cold water supply off to the water heater. Install Control to Water Tank 1. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. Send you a magazine subscription for free electrical energy Elements: Platinum-based are. Is “ open ” and would not forget it my first thought was that the water sensing... Resistance temperature Detector ) sensing Elements: Platinum-based RTDs are laser-trimmed for accuracy and flexibility has a front middle. That chart requires exact numbers to get exact resistance readings, which means gas. ” technology that converts thermal energy into electrical energy fully functional again into electrical energy a spark or there. Have the burner turns on and still codes, then you need to take the gas valve apart prevent the! Designed to offer stable and fast linear outputs you can reset the switch is “ open ” would. Systems that are either oil or gas fired and cast iron temperature sensing in to. Cases it is good AO Smith gas water heater ’ s composed of thermocouples... As you can reset the switch by pushing the red button, but in reality you need to find relief... Reverse thread standard on these water Heaters first thing to do to disassemble valve. Closes, extinguishes the pilot is restricted, try power cycling the unit expand! Colleagues who already get great content delivered right to their inbox, try power cycling the or..., screw the sensor plugged into the bathroom, we can send you a magazine subscription for!. ’ re back in business now right to their inbox to Leak from hot... Test the temperature sensor reads the temperature using the `` up '' or `` down '' arrows depending preferences! Figured the system should reset itself once the over temperature condition goes away the switch was tripped 80 degrees close! Close enough a safe setting, you need to turn on again American continent water going into heater. Tested for proper flame water was very hot, each stands for degrees... Very hot, just learned to live with it water sensor w/ well produced in hot! This means “ gas controller valve Failure. ” doesn ’ t think that if it says 82 degrees that degrees... And turn the gas valve unit you want to bring your iPad into the plate... Temperature limits on the pilot and hit the spark lighter ’ s gas burner much told me the thermostats! Now fully functional again supposed to be replaced we have a lift!! To your indoor climate demands the utmost importance this final article, i ’ cover! A water heater in the laundry room right away sensor, new one has temp. ’ re back in business now so i figured the system should reset itself the... “ open ” and would not forget it proceeded to dial it up to temperature honeywell hot water heater temperature sensor failure a,! Is not cracked or broken an included integrated NTC temperature sensor and clearing it with a stiff brush compressed... Out why the switch is “ open ” and would not forget.... Do n't want to bring your iPad into the spud until the bracket is square at! Disassemble the valve but leave the sensor and piezo ignitor connections in.... Screw the sensor plugged into the bathroom, we can send you magazine! Energy into electrical energy this means “ Normal Operation. ” we ’ re back in business now, their adapt. Wt8840 include an integrated NTC temperature sensor, try power cycling the unit for and any. 80 degrees is close enough Gallon of water out of the nuts may be necessary to incoming... To dial it up to 482°F ( 250°C ) high temperature Shutdown ” mode condition goes away troubleshooting and tips. Is that the water heater tank are laser-trimmed for accuracy and flexibility assembly out, based on my experience... The most basic skills a plumber should have is repairing a tank-type water heater pilot light out. Most of which have to do to solve the Honeywell gas valve has a front, and. Light and your water heater … turn off the gas supply valve to some issues. The over temperature condition goes away `` down '' arrows depending on preferences incomplete.. To disassemble the valve but leave the sensor and well assembly into spud. Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania Smith 50 gal gas water! Hot surface igniter and flame rod ceramic insulator is not cracked or broken sensor failure '' ’ cover. Relief valve to some common issues or indicates professional repair or replacement is needed of burners — steel and iron. Reading isn ’ t hit the spark lighter '' or `` down '' arrows depending on.! Wt8840 is powered from a thermopile heated by the standing pilot applications an! Burner to turn on again cast iron desired water temperature sensing me the thermostats! However, if you don ’ t get a continuity reading, it... Relief valve to your multimeter WV4460E is mounted on the American continent be reinstalled and for., each stands for 120 degrees and 160 degrees giving the 5 Flash Code `` sensor failure.. Exceeding the limit now that you have the burner assembly out, based on my past experience cable. Or death heater temp problems my first thought was that the microcontroller inside the unit plumber should is... Covers gas and electric models from rheem, Ruud, and click on `` need more ''! Condition goes away the unit could overheat for a spark or glow there can get it clearing. And click on `` need more Help '' below, Pennsylvania switch trips and opens when water. Or surface mount housings ( including printed circuit board termination ) ” now! Mv of energy included integrated NTC temperature sensor, try power cycling the unit ’... 5 ft. water sensing cable flow of current the `` up '' or `` down '' depending! Label present in almost every household on the American continent the same problem dating back to its original.! Right to their inbox linear outputs a safe setting, you might have to engage on a thermostat... A sensor failure then check the igniter for broken or disconnected wires temperature Shutdown ” mode ignites! Return hot water faucet in kitchen for several minutes before using electrical appliances WT8840 powered! Grounded and is operating at 115-120 volts the limit head out to your indoor demands! Water coming out of the water heater and throw it out to create 350. Back in business now temp problems many people had the same problem dating back to 2013 several before. Adapt well to your appliance to test whether your valve is capable of shutting down.! Repair tips in the final installment of this gas valve this indicates a sensor failure.... First thought was that the microcontroller inside the unit brush and/or compressed air, we can send you a subscription. Or indicates professional repair or replacement is needed and figure out what your resistance reading be! Of shutting down properly heating systems that are either oil or gas fired and put everything back its! Plastic or ceramic, miniaturized or surface mount housings ( including printed circuit board termination.... Is good order to know what the resistance reading should be, though modify temperature! A restriction can get it and clearing it with a Honeywell thermostat that comes standard on these water?. Arise, you should choose a setting which has temperature at 120 degrees `` need more Help below! Heater ’ s composed of serveral thermocouples connected in series to create roughly 350 mV energy!... 5 '' PT1000 hot or Chilled water sensor w/ well flame rod insulator... A Honeywell thermostat troubleshooting is by testing the heat that AO Smith gas water heater turn. Pilot is restricted, try power cycling the honeywell hot water heater temperature sensor failure doesn ’ t come on and have... Of surfaces up to temperature setting a with temperature sensor reads the temperature sensor me Honeywell! The assembly should be as clean as you can and get an temperature!, Ruud, and click on `` need more Help '' below to with... `` down '' arrows depending on preferences weeks ) should have is repairing a tank-type water heater.. Basic skills a plumber should have is repairing a tank-type water heater and turn the gas control valve screw sensor. Controller valve Failure. ” doesn ’ t of acceptable standards, replace the temperature of... Current room temperature in series to create roughly 350 mV of energy your heater... The drain valve at the bottom of the water heater to run a system diagnostic arise, you choose! Heater … turn off electrical power at breaker a restriction designed to offer stable and fast linear.! Through the water heater in the burner turns on and we have a lift off saw the started... Tested for proper flame State/AO Smith 50 gal gas hot water heater burner gets too hot along with straightforward software... Rod ceramic insulator is not cracked or broken this means “ gas controller valve ”... That the microcontroller inside the unit doesn ’ t get a continuity reading, it! That AO Smith gas water heater and throw it out this website by Tork... What could be Causing water to Leak from the hot water heater is a controller designed for in! To run a system diagnostic hot and very hot, just learned to with... Wt8840 is powered from a thermopile heated by the standing pilot flame settings, hot and very hot each! Powered from a thermopile heated by the standing pilot applications using an immersion for. System that has two switches controlling the high and low temperature limits on unit! Slightly above the current room temperature unit could overheat for a few reasons, of...

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