F31
Viking
High-Limit Thermostat Open
Viking oven shows F31; cooling fan may run and oven may not heat.
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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
Tripped high-limit thermostat due to overheat, Failed high-limit thermostat stuck open, Poor ventilation around oven, Cooling fan failure causing overheat
How to Fix / Troubleshooting
Safety: Turn off power and allow the oven to cool completely. Components near the high-limit can be very hot.
Steps:
- Locate the high-limit thermostat (often on the rear of the oven or top of the cavity). It is usually a small round or rectangular device with two terminals.
- Test for continuity across the thermostat. If open, check whether it has a manual reset button; press to reset if present.
- If it does not reset or opens again quickly, investigate causes of overheating: blocked vents, failed cooling fan, or improper installation clearance.
- Replace the high-limit thermostat if it will not reset or tests defective.
- Verify cooling fan operation and clear all ventilation paths before returning the oven to service.
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Repair Difficulty
Hard
4/5
Required Part
High-Limit Thermostat
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