Black+Decker
Output drive failure from control board
Timer counts down but heater and fan do 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 heater relay and fan relay on main control PCB,Loose output harness connectors,Open neutral or live feed to loads,Internal wiring harness damage
How to Fix / Troubleshooting
Safety first: Unplug the air fryer and allow it to cool before opening. You will be working near mains voltage components.
Troubleshooting steps:
- 1. Confirm symptom: Start a cycle and observe that the timer counts down but there is no fan noise or heat. Then unplug the unit.
- 2. Inspect wiring: Remove the rear or bottom cover to access the wiring harness from the main control PCB to the fan and heater. Check for loose connectors or damaged wires.
- 3. Test loads: Individually test the fan motor and heating element for continuity. If both are good, suspect the control board.
- 4. Check board relays: On the main control PCB, inspect the heater and fan relays for burn marks or cracked solder joints. If relays do not click during operation or show visible damage, replace the main control PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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