Whirlpool Water Heater Temperature Sensor Failure

The Short Answer: A temperature sensor fault means the heater’s electronic control can no longer get a believable reading from its water temperature sensor, so it stops heating. On most models the sensor is part of the gas control or the electronic electric control, so the fix is usually that assembly, not a thermocouple or element. Confirm the code on your heater’s label first.

Who made your Whirlpool water heater?

Whirlpool did not build its own water heaters. Whirlpool-branded tank heaters sold in the U.S. were made under license by American Water Heater, which is part of A. O. Smith. Parts, manuals and warranty questions therefore go through the manufacturer listed on the rating plate, not Whirlpool’s appliance service. The A. O. Smith model and manual lookup (opens in a new tab) and the phone number on the rating plate are the places to start.

How the fault shows up

Which display you see depends on the model:

• Gas models with an electronic gas control have a status light on the control that flashes a count. The label on the control or inside the manual lists what each count means.
• Electric models with an electronic control may show a code on a display or a flashing light.
• Gas models with a basic standing-pilot valve (no status light) have no electronic temperature sensor and cannot show this fault. A pilot that won’t stay lit on those is covered in why a gas water heater won’t stay lit.

We could not confirm a published Whirlpool flash-code chart, so we do not list one here. For comparison, Bradford White documents five flashes as a “thermostat sensor fault” on its ICON atmospheric gas control (guide 238-55948 (opens in a new tab)), but counts differ between manufacturers and control versions. Use the chart printed on your heater.

Sensor fault or something else?

What you can check safely

• Photograph the flash pattern or code and the label that explains it.
• Record the model and serial number from the rating plate.
• On a gas heater, turn the gas control to OFF, wait the time stated on the lighting label, and relight once following the label. If the sensor fault returns, leave it off.
• On an electric heater, turn the breaker off and back on once. If the code returns, leave the breaker off.
• Look for water around the gas control or on the heater. A wet control is a common cause of electronic faults.

Do not unplug or jumper the sensor, open the gas control, or remove the electric access covers.

What the technician will check

They will read the fault, check the sensor’s wiring and connector, and measure the sensor’s resistance against the manufacturer’s temperature chart. On many gas controls the sensor is built into the control or its cover, so a confirmed sensor fault means replacing that assembly with the exact part for the model. They will also look for water damage that may have caused the failure.

Repair or replace

A sensor or control replacement is a repair. On an older tank, the cost of a new gas control can approach the cost of a new heater, so age and tank condition matter. If the tank leaks, replace the heater. How to tell your water heater’s age explains how to read the serial number.

Frequently Asked Questions

Q: Can I replace just the sensor? A: On many electronic gas controls, the sensor is not sold separately; it comes with the control or a control cover. A technician can confirm which part your model uses.

Q: Is a temperature sensor fault dangerous? A: The shutdown is a protective response: the control stops heating because it cannot confirm the water temperature. Leave the heater off rather than trying to force it to run.

Q: Does a Rheem or Bradford White chart apply to my Whirlpool? A: No. Even when controls look similar, the codes differ between manufacturers and versions. Use the label on your heater or the manual for your model number.