E1
Nibe
Electric heater element failure (stage 1)
E1 alarm, electric heater stage 1 fault, reduced heating capacity
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Burnt heater element, tripped internal thermal cut‑out, faulty heater contactor, wiring fault
How to Fix / Troubleshooting
Safety: Isolate power and verify with a tester before opening the heater compartment. Risk of severe electric shock.
- Check fuses/breakers: Verify that the circuit breakers feeding the electric heater are on and not tripped.
- Inspect wiring and contactor: Look for burnt wires or contacts on the heater contactor. Do not touch live parts.
- Reset internal cut‑out: Some Nibe heater modules have manual reset buttons on the thermal cut‑outs. With power off, press to reset.
If E1 persists, the heater element or contactor likely needs replacement by a qualified electrician or Nibe technician.
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Repair Difficulty
Hard
4/5
Required Part
Electric Heater Element Stage 1
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