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Tech Tips
Unit Not Defrosting
FI0015
- Unit Undercharged
- Defrost Control Problem
- Demand
- Coil Sensor Loose Or Not Secured Properly To Coil
- Air Sensor In Contact With Coil
- Bad Defrost Control
- Time/Temperature
- Coil Thermostat Loose Or Not Secured Properly To Coil
- Bad Defrost Thermostat
- Time Setting Incorrect For Application
- Bad Defrost Control
- Bad Defrost Relay
- Refrigerant Circuit Problem
- Bad TXV or Piston At Indoor Coil
- Restriction In Liquid Line
- Oversized Liquid Line
- Reversing Valve Stuck In Heat Mode
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