Viking Stuck Cooling Fan Thermostat or Relay

Oven fan runs continuously even when the oven is off and cool.

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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

Cooling fan thermostat stuck closed, Relay on control board welded closed, Shorted wiring causing constant fan power, Control board logic fault

How to Fix / Troubleshooting

Safety first: Turn off power at the breaker before accessing the fan or control board.

Steps to check and correct:

  • Allow full cool-down: Some models keep the fan running until the oven is fully cool. Wait at least 30–60 minutes to see if it stops.
  • Inspect thermostat: Locate the cooling fan thermostat (usually on the oven top or rear). Test for continuity at room temperature; it should be open. Replace if stuck closed.
  • Check control relay: Inspect the control board for a stuck or burnt fan relay. If the relay contacts are welded, the board must be replaced.

When to call a technician: If board replacement is needed or you cannot locate the thermostat, contact a service professional.

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Repair Difficulty

Hard 4/5

Required Part

Cooling Fan Thermostat
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