Water Heater Temperature Sensor Failure

If you get this code and have lukewarm water and the pilot is still on try turning up the temperature.

Water heater temperature sensor failure.

Shop by popular models. Miscellaneous parts motor parts sensor thermistor parts switch parts. It also displays sensor failure. Shop by ao smith water heater parts.

Thermostat parts valve float parts. If the water temperature is exceeding the maximum high limit set for it by the thermostat there. I go out yesterday morning and the heater is off the pool water temperature is 74f per thermometer in the pool but the heater display on the heater says the water temp is 104f. It has a printed circuit board inside that with age develops microscopic cracks in it that tends to cause the intermittent sorts of problems that you are reporting.

With the pump off you will see the white nut that holds the sensor in place. Find the most common problems that can cause a ao smith water heater not to work and the parts instructions to fix them. Now you have access to where the sensor plugs in. Remove the side panels where the water pipes are at.

That has a 90 chance of solving the problem. The temperature reading is very critical and detail is of the utmost importance. To reduce the risk of property damage serious injury or death read and follow all labels on the water heater and the safety instructions in the printed owner s manual. Look up the manufacturer s chart for sensor resistance at various temperatures and figure out what your resistance reading should be.

So i took the temperature sensor out it had a little corrosion on the tip so i. If that should fail replace the pilot assembly and the entire gas valve controller assembly. Drain about 4 to 5 gallons of water out of the drain valve at the bottom of the water heater and throw it out. Internal sensor failure the information on this web site is supplemental to the printed instructions that came with your water heater.

7 replace gas valve overall failure of the gas valve and will usually require replacement. Now drain 1 gallon of water from the bottom of the tank as quickly as you can and get an accurate temperature reading. Remove the front panel unscrew the four screws holding the front bezel in place. I turned the heater off at the display panel.

5 replace gas valve this indicates a sensor failure and the gas control valve must be replaced. Most whirlpool water heaters come with diagnostic code lights that can help pinpoint problems.