Wolf
Safety Device Interruption
Furnace starts but shuts down shortly after ignition; thermostat still calling for 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
Intermittent high limit opening, Loose wiring on rollout or limit switches, Faulty flame sensor on Wolf furnace, Poor ground connection
How to Fix / Troubleshooting
Safety: Turn off power and gas before checking safety circuits.
- Wiring check: Inspect all safety switch connections (high limit, rollout, pressure switch) for loose spade terminals or damaged wires. Reseat and secure as needed.
- Flame sensor cleaning: Clean the flame sensor to ensure reliable flame detection.
- Grounding: Verify that the furnace ground wire is securely attached to the chassis and that the burner assembly has a solid metal-to-metal connection.
- Monitor operation: After corrections, observe a full heating cycle. If shutdowns persist, a technician should test each safety device and the Wolf control board.
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Repair Difficulty
Medium
3/5
Required Part
Wolf High Limit Switch
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