Code decoder
Eemax error codes
Pick the maker and the equipment, or type the code. Each page says what the code means on that control, what is safe to check and when to stop.
- Codes
- 2,442
- Makers with codes
- 98
- Updated
- November 2026
E0Eemax Booster Heater Error Code E0: Excessive Water FlowE1Eemax Booster Heater Error Code E1: Inlet Water Too HotF0Eemax Booster Heater Error Code F0: Outlet Thermistor Out of RangeF1Eemax Booster Heater Error Code F1: No Water Temperature ChangeF2Eemax Booster Heater Error Code F2: Dry Fire DetectedF3Eemax Booster Heater Error Code F3: Excessive Dry Fire EventsF4Eemax Booster Heater Error Code F4: Inlet Thermistor Out of Range
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Code not listed, or no code at all?
A unit that shows nothing often points to power or the control. Call us with the maker and model number and we talk it through.