Rheem Error Code E3
Evaporator coil sensor failure
Error Code Summary
| Brand | Rheem |
| Error Code | E3 |
| Meaning | Evaporator coil sensor failure |
| Cause | Indoor coil thermistor open or short circuit |
| Recommended Action | Inspect sensor connection on evaporator, replace if out of spec |
How to Fix Rheem Error E3
- 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 E3 means: Evaporator coil sensor failure. The most common cause is: Indoor coil thermistor open or short circuit.
- 3
Take Corrective Action
Inspect sensor connection on evaporator, replace if out of spec
- 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 E3 mean?
Rheem error code E3 indicates: Evaporator coil sensor failure. This is typically caused by: Indoor coil thermistor open or short circuit.
How do I fix Rheem error code E3?
To fix Rheem error code E3: Inspect sensor connection on evaporator, replace if out of spec. If the error persists after these steps, contact a qualified HVAC technician.
Is Rheem error code E3 serious?
Error code E3 (Evaporator coil sensor failure) 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.