Pennco
No Power to Boiler
Boiler will not start at all, no lights or display
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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 circuit breaker, Faulty service switch, Loose wiring in junction box, Blown internal fuse on Pennco control board
How to Fix / Troubleshooting
Danger: This involves line voltage. If unsure, contact an electrician or technician.
- Check breaker: Locate the boiler circuit breaker in the panel and ensure it is ON. Reset if tripped, but investigate why it tripped if it happens again.
- Verify service switch: Confirm the boiler service switch (often near the boiler) is ON. Replace if it feels loose or does not click firmly.
- Inspect junction box: With power off, open the boiler's electrical junction box and check for loose wire nuts or burned connections.
- Internal fuse: Some Pennco controls have a small fuse. With power off, inspect and replace with the exact type and rating if blown.
- If power is present but no display: The integrated control board may have failed and should be replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Boiler Service Switch
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