Alpha Pilot Flame Holding Failure

Pilot light will not stay lit on standing-pilot Alpha gas water heater (if applicable).

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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 or dirty thermocouple, Insufficient pilot flame, Drafts blowing out pilot, Faulty gas control valve

How to Fix / Troubleshooting

Safety: Follow Alpha lighting instructions exactly. If you smell gas, stop and ventilate the area.

  • Clean pilot: Turn gas control to OFF and allow time for gas to dissipate. Remove the pilot assembly and clean the pilot orifice with compressed air.
  • Check thermocouple: Ensure the thermocouple tip is properly positioned in the pilot flame and connections to the gas control are tight.
  • Test thermocouple: With a multimeter, measure thermocouple output while heated; replace if output is below specification.
  • Relight: Follow the Alpha lighting procedure. If the pilot still will not stay lit, the gas control valve may need replacement.

Gas valve replacement should be performed by a licensed gas technician.

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Repair Difficulty

Hard 4/5

Required Part

Thermocouple
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