Honeywell
No Power / Dead Unit
Air conditioner does not turn on at all; no lights or display.
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
Tripped circuit breaker, Blown internal fuse on control board, Damaged power cord, Failed main control board
How to Fix / Troubleshooting
Safety: Always disconnect power at the outlet or breaker before opening the unit.
Steps:
- Check outlet and breaker: Test the outlet with another appliance. Reset any tripped breakers or GFCI outlets.
- Inspect power cord: Look for cuts, burns, or kinks. Replace the cord if damaged.
- Check internal fuse: Remove the front or side panel to access the main control board. Look for a small glass or ceramic fuse. Test with a multimeter and replace with the same type and rating if blown.
- Control board: If the fuse is good and power is present at the board but the unit is dead, the main PCB may be faulty and should be replaced.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Main Control Board
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements