Granitestone Intermittent Power Loss / Thermal Protection

Unit shuts off mid-cycle without any error code.

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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

Overheating triggering thermal cutoff, Loose power cord connection, Failing main control PCB, Faulty door/basket switch losing contact from vibration

How to Fix / Troubleshooting

Safety first: Unplug before inspecting internal components.

Steps to troubleshoot mid-cycle shutoff:

  • 1. Check ventilation: Ensure adequate clearance around the air fryer and that vents are not blocked.
  • 2. Inspect power cord and plug: Wiggle the power cord gently at the outlet and at the unit (while unplugged) to check for looseness or damage.
  • 3. Door/basket switch: Verify the door/basket microswitch is firmly mounted and that the drawer fully engages it. Replace if intermittent.
  • 4. Thermal cutoff: Inspect the thermal fuse / high-limit thermostat. If it is cycling open due to overheating, clean vents and consider replacing the thermostat if it trips too early.
  • 5. Control PCB: If all else checks out, the main control PCB may be failing under heat and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

High-Limit Thermostat
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