Heat Pump Frozen or Iced Over
Common Symptoms
Thick ice covering outdoor unit
Reduced heating performance
Strange sounds from outdoor unit
Unit not defrosting
Ice blocking fan blade
Possible Causes
Several factors can contribute to this problem. Understanding the cause helps determine the right solution.
1Failed defrost control
2Defrost timer malfunction
3Low refrigerant
4Faulty reversing valve
5Outdoor fan motor failure
6Blocked outdoor coil
7Refrigerant restriction
What You Can Check First
Before calling a technician, try these simple checks that may resolve the issue.
1
Check if fan is running (turn off power first)
2
Look for debris blocking airflow
3
Verify coil isn't blocked by snow/leaves
4
Do NOT try to remove ice manually (damage risk)
5
Check air filter inside
When to Call a Professional
Heavy ice buildup
Unit not defrosting after extended time
Fan not running
Ice returns quickly after any melting
Professional defrost needed
Experiencing any of these situations?
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