BWT
Excessive Defrost Cycling
Heater frequently goes into defrost mode and heating output is low
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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
Defrost sensor misreading coil temperature, Very humid and cold ambient conditions, Control board defrost settings incorrect, Restricted airflow causing rapid icing
How to Fix / Troubleshooting
Safety first: Turn off power before accessing sensors or coils.
- Clean coil and ensure airflow: Remove all debris from the evaporator coil and maintain clearances around the unit.
- Check defrost sensor placement: Ensure the sensor is firmly attached to the coil in the correct location as per BWT guidelines.
- Monitor ambient conditions: In very cold, humid weather, more frequent defrost is normal, but the unit should still provide net heating.
If defrost cycles are abnormally frequent in mild conditions, a technician should evaluate the defrost sensor and control logic.
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Repair Difficulty
Medium
3/5
Required Part
BWT Defrost / Coil Temperature Sensor
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