American Whirlpool
Temperature Regulation or Sensor Placement Issue
Water temperature fluctuates noticeably during use; gets too hot or too cool
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Temperature sensor not fully seated in heater well, Poor water circulation past sensor, Intermittent sensor connection, Control algorithm issues
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI breaker before adjusting sensors.
Temperature swings can be caused by sensor or flow problems.
- Verify sensor seating: Locate the main temperature sensor in the heater tube and ensure it is fully inserted and secured.
- Check circulation: Confirm the circulation pump runs as programmed and that filters are clean.
- Inspect sensor wiring: Look for loose or corroded connections at the control board.
- Replace sensor if erratic: If temperature readings jump or are inconsistent, install a new American Whirlpool temperature sensor.
If fluctuations persist, the control board's temperature regulation may need professional evaluation.
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Repair Difficulty
Medium
3/5
Required Part
Water Temperature Sensor (Heater Thermistor)
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