GoWISE USA Output drive failure from control board

Timer counts down but heater and fan do not run; unit appears to be in a silent countdown.

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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 and fan relays,Open wiring harness from board to heater/fan,Control board firmware glitch,Incorrect mode selection not engaging outputs

How to Fix / Troubleshooting

Safety first: Unplug before internal inspection. Do not attempt to jumper outputs without proper knowledge.

Step-by-step checks:

  • Verify mode: Ensure you have selected a cooking mode that should run both heater and fan (e.g., standard air fry, not a keep-warm-only mode).
  • Power reset: Unplug for 10 minutes and retry. Firmware glitches can sometimes clear.
  • Listen for relays: When starting a cycle, listen for soft clicks from the control board. No clicks may indicate relay or control failure.
  • Check harnesses: Open the housing and verify that the heater and fan connectors are firmly attached to the control board.
  • Board replacement: If the timer runs but no outputs are energized and wiring is intact, the main control board is likely defective and should be replaced.

When to stop: Component-level repair of the control board is not recommended for most users. Replace the board or seek professional service.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board
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