Once you see water coming out of the hot water faucet, turn the hot water faucet off. This leak sensor is great for stopping water or flood damage from water heaters, sump pumps, washing machines, dishwashers, sinks or toilets. Hydrogen gas is extremely flammable and can ignite. Is there any tip for maintaining a water heater? When you take the burner assembly out, remember that some of the nuts may be reverse thread. The water heater is a 40 Gallon Whirlpool N40T121-403. Failure to comply with this could result in substantial property damage, severe personal injury or death. Not enough hot water: 1. The system kept coming back with 4 flashes. 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. Clean everything. Modify the temperature using the "UP" or "DOWN" arrows depending on preferences. Page 17: Service Procedures SERVICE PROCEDURES Removing the Manifold/ 8. Make sure there is no flow of water through the water heater and turn the cold water supply off to the water heater. View solutions. Think through why it could overheat. I first saw the LED flashed 7 times, which means “Gas Controller Valve Failure.” Doesn’t sound good. No go. Set the thermostat or the device's controller slightly above the current room temperature. Free repair advice! You just need to turn on the thermostat to the heat position. The first thing to do to solve the Honeywell thermostat troubleshooting is by testing the heat. I left it disconnected for overnight. 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. Honeywell water heater thermostat valve. 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. 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. 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. 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. ... Sensor & Thermistor Parts Valve & Float Parts. 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. So I removed the PCB (printed circuit board) from its housing by unscrewing the torx screw and snapping the PCB from the housing. After a minute or so, the LED started blinking once and paused and blinking once again. Make sure the water heater is properly grounded and is operating at 115-120 volts. Five flashes every three seconds indicates an internal sensor failure. That chart requires exact numbers to get exact resistance readings. This means “Normal Operation.” We’re back in business now. This was 10pm two days ago. I checked that AO Smith Gas Water heater in the laundry room right away. Combination thermostat/gas valve set too low for desired water temperature. The Aquastat uses an immersion system that has two switches controlling the high and low temperature limits on the heater. !” Not good. No hot water! Ensure that the 3-wire lead from the well assembly Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. 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. The Honeywell gas valve went into “High Temperature Shutdown” mode. Turn off electrical power at breaker. Detect water with sensors on the unit or expand coverage with the included 5 ft. water sensing cable. 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. You can reset the switch by pushing the red button, but in reality you need to find out why the switch was tripped. Along with straightforward management software, their products adapt well to your indoor climate demands. Join your colleagues who already get great content delivered right to their inbox. See figures. They pretty much told me the Honeywell thermostats never fail. I just saved $110 (Walmart’s price) for the module and enduring days of suffering through cold showers and complaints from my family members. Use a maximum torque of 31 ft. lb. Do what you need to do to disassemble the valve but leave the sensor plugged into the back plate. Turn off the gas supply valve to your appliance to test whether your valve is capable of shutting down properly. Press the "HOT WATER TEMPERATURE" button. There are separate adjustments and a … … In this final article, I’ll cover temperature sensors, erratic combustion and thermal switches. The WV4460E is mounted on the outside of the water heater tank. 5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. What a nifty device! Most newer water heaters use Honeywell gas valves. There are two types of burners — steel and cast iron. This unit (Honeywell WT8840B1000) replaced my old WV8840B1042, which was throwing a "5 flash" code (Temperature sensor failure). The temperature reading is very critical and detail is of the utmost importance. These temperature sensors are designed to offer stable and fast linear outputs. Step 1. Before you get into how to test the temperature sensor, try power cycling the unit. To return hot water system to service, open a hot water faucet in kitchen for several minutes before using electrical appliances. Sign up now. 60 minutes: No go. The pilot ignites the water heater’s gas burner. If you don't want to bring your iPad into the bathroom, we can send you a magazine subscription for free! I tried disconnecting it for 30 minutes. 3 possible causes and potential solutions . Anthony Pacilla is a registered master plumber for McVehil Plumbing in Washington, Pennsylvania. It uses a “thermopile” technology that converts thermal energy into electrical energy. 2. This guide to common water heater problems covers gas and electric models from Rheem, Ruud, and other brands. Water Heater Honeywell BH-777FTE User Instructions. Rheem water heater troubleshooting allows you to find pressure relief valve to some common issues or indicates professional repair or replacement is needed. I kept resetting the system without much success to get the gas burner to turn on again. Fire or Explosion Harzard. ... (Locating the Water Heater) continued- Water heater corrosion and component failure can be caused by the heating and breakdown of airborne chemical vapors. 2. Restore power and then allow the water heater to run a system diagnostic. He has 22 years of experience in the plumbing and HVAC trades, and has a bachelor’s in business and economics from Thiel College. I heard a scream from my wife in the shower, “No hot water! See Fig. The WV8860Q Water Heater Control is designed for use in Standing Pilot applications using an immersion well for water temperature sensing. Deliberately, maliciously, and probably under the pretense of safety. 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. ... Water heater too hot. The Honeywell Aquastat is a controller designed for boiler water control in heating systems that are either oil or gas fired. 2.Extremely cold water going into the heater will decrease the amount of hot water produced. 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. It may be necessary to temper incoming water supply. Turn on the pilot and hit the spark lighter. Most newer water heaters use Honeywell gas valves. Which means, the choice is hot setting. 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. I always had issues with the temperature, and the water was very hot, just learned to live with it. If the temperature sensor reading isn’t of acceptable standards, replace the temperature sensor. Then I put it back to its housing and put everything back to its original positions. The unit could overheat for a few reasons, most of which have to do with incomplete combustion. Don’t hit the reset switch and head out to your next call. Based on the “Status Light Code,” it means “Temperature Exceeded.” It made sense as we had a heat wave recently. Hydrogen gas can be produced in a hot water system after a period of non-use (generally two or more weeks). That sounded easy. What else could it be? Install of an AO Smith gas water heater with a Honeywell control valve. Write down the resistance reading. Shut off the power and then check the igniter for broken or disconnected wires. Because you want to test the heat, it is better to set the temperature as higher as it can. If all else fails, the heating element may be failing, and needs to be replaced. RTD (Resistance Temperature Detector) Sensing Elements: Platinum-based RTDs are laser-trimmed for accuracy and flexibility. That sounded easy. Locate the hot surface igniter and look for a spark or glow there. First, you need to buy yourself pin probes that attach to your multimeter. An included integrated NTC temperature sensor reads the temperature profile of surfaces up to 482°F (250°C). I tried disconnecting it for 30 minutes. 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. If the unit doesn’t come on and still codes, then you need to take the gas valve apart. 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. Install Control to Water Tank 1. If the pilot does not light, the water heater will not heat. To install the water heater control, screw the sensor and well assembly into the spud until the bracket is square. 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". plus one turn. 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. 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. Still no go. ... 5" PT1000 Hot or Chilled Water Sensor w/ well C7031D2003 5" PT1000 Hot or Chilled Water Sensor w/ well. If you get a continuity reading, then it is good. Water temp sensor is located on back of this gas valve unit. Often blamed on sediment in the tank, the 4 flashes is one of the most common problems with the Other temperature settings, hot and very hot, each stands for 120 degrees and 160 degrees. Please enable JavaScript to view the comments. The problem is that the microcontroller inside the unit remembers the last “over-temp condition” and would not forget it. What Could Be Causing Water to Leak from the Hot Water Heaters? 3. Immediately, the burner turns on and we have a lift off! Press the green tick to save the changes. Cold inlet water temperature is very cold. Then I proceeded to dial it up to temperature setting A. The Honeywell gas valve has a front, middle and back with temperature sensor and piezo ignitor connections in between. It is designed for use in standing pilot applications using an immersion well for water temperature sensing. Again, if you want a safe setting, you should choose a setting which has temperature at 120 degrees. It’s composed of serveral thermocouples connected in series to create roughly 350 mV of energy. 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. SKU: C7031D2003. 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