Nibe
Demand Signal Failure
Boiler display works but there is no response to heating or hot water demand
Advertisements
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.
Advertisements
Possible Causes
Faulty external controls (timer/programmer), Broken thermostat wiring, Incorrect parameter settings in Nibe controller, Faulty demand input on PCB
How to Fix / Troubleshooting
Safety first: Isolate power before working on control wiring.
- Check programmer: Ensure heating and hot water channels are set to ON or timed appropriately.
- Use manual override: Many programmers have a manual ON button; test if the boiler responds when forced ON.
- Check Nibe parameters: In the installer menu, verify that external control inputs are configured correctly (if accessible and you are competent).
- Professional diagnosis: A technician can test the demand terminals on the Nibe PCB and repair or replace faulty external controls or the PCB.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
External Programmer / Nibe Control PCB
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements