Rheem Heat Pump error codes
6 Rheem heat pump codes and problems, each with ranked causes, safe homeowner checks and honest repair costs. Count the flashes or read the code on your control board, then find it below. Legends vary by board revision, so confirm against the label inside your unit's door.
| Code | What it means | Severity |
|---|---|---|
| Flashing fault light | Rheem heat pump flashing fault light on the defrost board? What the blink codes mean, causes ranked by likelihood, safe checks, and repair costs. | Call a pro |
| Frozen and not defrosting | Rheem heat pump iced up and not defrosting? Learn the causes (defrost board, sensor, airflow, low charge), safe checks, and repair costs from $0 to $1,500+. | Call a pro |
| Ice on outdoor unit | Ice on a Rheem heat pump outdoor unit: normal frost vs. a real problem, the main causes (airflow, drainage, low charge), safe fixes and repair costs. | Call a pro |
| Not cooling | Rheem heat pump not cooling? Learn the likely causes (capacitor, contactor, refrigerant, reversing valve), safe checks and honest US repair costs. | Call a pro |
| Not heating | Rheem heat pump not heating? Ranked causes from thermostat settings to reversing valves and low refrigerant, safe checks, and repair costs from $0 to $2,500+. | Call a pro |
| Stuck in defrost mode | Rheem heat pump stuck in defrost? Learn the likely causes (defrost board, coil sensor, reversing valve), safe checks, and repair costs from $0 to $2,500. | Call a pro |
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