La Cornue
Seized Valve or Thermostat Shaft
Control knobs on a La Cornue range oven are very stiff or difficult to turn.
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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
Grease buildup behind knob, Corroded gas valve stem, Worn mechanical thermostat shaft, Misaligned knob or bezel
How to Fix / Troubleshooting
Safety first: For gas valves, do not apply excessive force that could crack the valve body. Disconnect power and shut off gas if removing front panels.
- 1. Remove knob: Pull the knob straight off the shaft. Clean the knob and surrounding area of grease and debris.
- 2. Inspect shaft: Check for corrosion or physical damage. Do not lubricate gas valve stems with inappropriate products; use only manufacturer-approved lubricants if specified.
- 3. Check alignment: Ensure the knob and bezel are not rubbing against each other. Adjust or replace if warped.
- 4. Replace valve or thermostat: If the shaft remains stiff or binds, the gas valve or thermostat assembly should be replaced by a qualified technician.
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Repair Difficulty
Hard
4/5
Required Part
Oven Gas Valve / Thermostat
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