NTI
No Power / Dead Control
Boiler will not start at all; display is blank or completely off
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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
Tripped breaker or blown fuse, Faulty service switch, Loose power wiring, Failed control board
How to Fix / Troubleshooting
Safety: Verify power is off before opening electrical compartments.
- Check breaker: Confirm the boiler’s circuit breaker is ON and not tripped. Reset once if necessary.
- Service switch: Ensure the boiler’s local disconnect or service switch is ON.
- Inspect wiring: Remove the electrical cover and check for loose connections at the terminal block and internal fuses on the NTI control board. Replace blown fuses only with identical ratings and investigate the cause.
- Board replacement: If correct voltage is present at the board but the display remains dead, the control board likely needs replacement by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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