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Allied · Furnace troubleshooting

Burner assembly cleaning

92G1UH

What is going on

Clean the burners and inspect the crossovers for blockage.

Check in this order

  1. Turn off gas and electrical power and remove the heating compartment access panel.
  2. Disconnect the gas supply line and gas valve wires, labelling each wire.
  3. Disconnect the ignitor plug, rollout switch wires, flame sensor wire and burner ground wire, labelling each.
  4. Remove the four screws holding the burner/manifold assembly to the vestibule. Keep the ignitor plate from dislodging from the assembly.
  5. Gently clean the burner faces with a soft brush on a vacuum cleaner.
  6. Inspect the inside of the burners and crossovers and remove any blockage from foreign matter.
  7. Reinstall the burner assembly with the four existing screws. The burners self-align to the clam shells.
  8. Reconnect ground, flame sensor, rollout switch, ignitor, gas valve and gas supply wires.
  9. Check gas and electrical connections, restore power and gas, then run the furnace for 5 minutes to confirm the burners are clean and working.
  10. Replace the heating compartment access panel.

Applies to: 92G1UH furnace

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Source: Allied 92G1UH installation instructions manual, p. 56. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.