e3
Moderate
Rheem · HVAC Systems & Water Heaters
Dry Fire Protection (Water Heater)
Quick Answer
Error code E3 on your Rheem HVAC Systems & Water Heaters means: Dry Fire Protection (Water Heater). This is usually fixable — see the step-by-step guide below.
Likely Causes
How to Fix It
1
Turn off power to the water heater immediately
2
Verify the tank is full by opening a hot water faucet and confirming full flow
3
If the tank was recently installed or drained, ensure all air is purged from the tank
4
Check for excessive sediment buildup by draining a few gallons from the drain valve
5
After confirming the tank is full, reset the water heater per manufacturer instructions. If it will not reset, the element or control board may be damaged
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Heating element (if damaged by dry fire)
Control board
Anode rod (inspect during service)
Related Error Codes