E7
Drazice
Fan / Pump Control Error
Drazice electronic heater shows E7; fan or pump (on combined or heat-pump models) does not run.
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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
Failed circulation pump (for indirect or combined models), failed fan motor (for heat pump water heaters), blocked rotor, defective relay on control board
How to Fix / Troubleshooting
Warning: Isolate electrical power and, if connected to a heating system, close valves to avoid leaks.
Check pump or fan:
- Identify whether your Drazice model uses a circulation pump (for coil heating) or a fan (for heat pump units).
- Remove the cover to access the pump or fan wiring.
- Verify that the connector is firmly attached and that there are no burnt or loose wires.
- With power OFF, try to rotate the pump or fan rotor by hand (if accessible). It should turn freely. If seized, the component must be replaced.
- Restore power briefly and measure voltage at the pump/fan terminals when the unit calls for operation. If correct voltage is present but the motor does not run, replace the pump or fan assembly.
- If no voltage is present at the motor while E7 is active, the control board output or relay may be defective and require board replacement.
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Repair Difficulty
Hard
4/5
Required Part
Circulation Pump or Fan Motor
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