Princess
Output Drive Failure on Main PCB
Timer counts down but heater and fan do not run; only the display is active.
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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 relay or triac for heater and fan, Blown low-voltage driver components, Corrupted control firmware, Safety interlock not detected
How to Fix / Troubleshooting
Safety first: Unplug the unit before internal inspection.
Steps to diagnose:
- Check basket switch: Ensure the basket is fully inserted and the basket microswitch is functioning; if not detected, outputs may be inhibited.
- Listen for relays: Start a cycle and listen for relay clicks. No clicks may indicate a control issue.
- Inspect PCB: Look for burned or cracked relay/triac components on the main control PCB.
- Test outputs: With proper safety equipment, verify whether voltage is sent to the heater and fan when the unit should be running.
- Replace PCB: If outputs are not being driven despite correct inputs, replace the main control PCB.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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