Rheem Error Code F3
Discharge temperature sensor fault
Error Code Summary
| Brand | Rheem |
| Error Code | F3 |
| Meaning | Discharge temperature sensor fault |
| Cause | Compressor discharge thermistor (T5) open or short circuit |
| Recommended Action | Check sensor on compressor discharge line, replace if needed |
How to Fix Rheem Error F3
- 1
Power Cycle the Unit
Turn off the unit at the breaker, wait 5 minutes, then restore power. Some errors auto-clear after a restart.
- 2
Identify the Issue
Error F3 means: Discharge temperature sensor fault. The most common cause is: Compressor discharge thermistor (T5) open or short circuit.
- 3
Take Corrective Action
Check sensor on compressor discharge line, replace if needed
- 4
Test the System
After completing repairs, run the system and monitor for the error code. If it recurs, the issue may require professional diagnosis.
Safety Notice
Always disconnect power before performing any electrical work. If you're not a certified HVAC technician, contact a qualified professional for repairs involving refrigerant, electrical components, or compressor work.
Frequently Asked Questions
What does Rheem error code F3 mean?
Rheem error code F3 indicates: Discharge temperature sensor fault. This is typically caused by: Compressor discharge thermistor (T5) open or short circuit.
How do I fix Rheem error code F3?
To fix Rheem error code F3: Check sensor on compressor discharge line, replace if needed. If the error persists after these steps, contact a qualified HVAC technician.
Is Rheem error code F3 serious?
Error code F3 (Discharge temperature sensor fault) should be addressed promptly to prevent further damage to your Rheem system. Always turn off the unit if you notice unusual sounds, smells, or continued malfunction.