E32
Bradford White
Ambient Air Temperature Sensor Fault
Bradford White heat pump water heater shows E32; unit may run only on electric elements.
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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
Failed ambient thermistor, Sensor knocked out of position, Corroded connector, Control board failure
How to Fix / Troubleshooting
Safety: Turn off power at the breaker before opening the top cover.
Steps:
- Locate ambient sensor: This sensor is usually positioned to sense room air entering the evaporator coil.
- Check placement: Ensure it is not touching hot components or buried in insulation, which can cause incorrect readings.
- Inspect wiring and connector: Reseat the connector at the control board and check for corrosion.
- Test sensor: Measure resistance at room temperature and compare to the thermistor chart. Replace if out of spec.
If the code remains after sensor replacement, the main control board may need replacement by a professional.
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Repair Difficulty
Medium
3/5
Required Part
Ambient Air Temperature Sensor
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