Pahlen
Pilot Flame / Thermocouple Failure
Heater's pilot (on standing-pilot models) will not stay lit.
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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
Weak pilot flame due to dirty pilot orifice, Faulty thermocouple on Pahlen pilot assembly, Loose thermocouple connection at gas valve, Drafts blowing out pilot
How to Fix / Troubleshooting
Safety first: Turn off gas before working on the pilot assembly. Follow all gas safety precautions.
Step-by-step checks:
- Clean pilot orifice: Remove the pilot tube and gently clean the orifice with compressed air. Do not enlarge the opening.
- Inspect thermocouple: Ensure the thermocouple tip is properly positioned in the pilot flame. Tighten the thermocouple nut at the gas valve snugly but not excessively.
- Check flame quality: Relight the pilot and observe the flame. It should envelop the thermocouple tip. If it is small or yellow, further cleaning or gas pressure adjustment may be needed.
- Replace thermocouple: If the pilot lights but goes out when the button is released, replace the thermocouple with a compatible Pahlen part.
When to stop: If pilot issues persist, have a gas technician check gas pressure and valve operation.
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Repair Difficulty
Hard
4/5
Required Part
Pahlen pilot assembly / thermocouple
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