Rheem Error Code P1: Rheem Code P1 - Defrost Error
Warning: Your Rheem heat pump has detected a defrost error and has likely locked out to prevent damage. This means your heat pump is no longer heating efficiently and needs attention.
How to Fix Rheem Code P1
- Step 1: Check the outdoor unit for any obstructions like snow, ice, leaves, or debris blocking airflow. Clear away anything restricting the coil.
- Step 2: Ensure the area around the outdoor unit is clear to allow for proper ventilation.
- Step 3: If the issue persists after clearing any obstructions, contact a qualified HVAC technician to diagnose and repair the problem.
How to Reset Rheem Code P1
- Turn off the unit using the power button on the front panel.
- Turn off the gas supply valve.
- Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
- Restore power at the breaker, then open the gas valve.
- Turn the unit back on. If the error returns, the underlying issue needs repair.
What does P1 mean?
The P1 error code on your Rheem heat pump indicates a problem during the defrost cycle. Heat pumps move heat from outside to inside your home. When it's cold outside, frost can build up on the outdoor coil, reducing its ability to absorb heat. To combat this, the heat pump periodically goes into 'defrost' mode to melt the ice. The P1 error means the system isn't defrosting correctly, potentially due to a faulty sensor, a problem with the reversing valve, or airflow issues. Ignoring this can lead to the heat pump completely freezing up, causing further damage and leaving you without heat.
Affected Models
- R92V
- R92V
- R92E
- R92E
- R92E
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Classic 90 Plus
- Rheem Classic 80 Plus
- Rheem Prestige Series
- Rheem Classic Series
- Rheem Prestige Series
- Rheem Classic Series
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Prestige
- Rheem Classic
- Rheem Prestige Series
- Rheem Classic Series
- NCB
- NPE
- RNC
- RNG
- RNE
- Rheem Classic Series
- Rheem Classic Plus Series
- RNC
- RPB
- Rheem Prestige Series
- Rheem Classic Series
- RNC
- R801T
- R801T
- RH2T
- RP16
- RP16
- RTGH
- RGE
- Rheem Classic Plus Series
- Rheem Classic Plus Series
- Rheem Classic Series
- Rheem Classic Series
- Rheem Classic Plus Series
- Rheem Prestige Series
- Rheem Classic 80% Gas Furnace
- Rheem Prestige 95% Gas Furnace
- R92V
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Defrost Sensor (Thermistor) | — | — |
| Reversing Valve | — | — |
| Control Board | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| A001 | Ignition Failure | Warning |
| A003 | Abnormal Ignition | Warning |
| A004 | False Flame Detection | Warning |
| A008 | Exhaust Temperature High | Warning |
| A011 | No Flame Detected | Warning |
| A021 | Over-Temperature | Warning |
| A031 | Inlet Thermistor Open/Short | Warning |
| A041 | Outlet Thermistor Open/Short | Warning |
| A043 | Water Level Error | Warning |
| A051 | Fan Motor Abnormality | Warning |