Chaffoteaux Delayed Ignition

Furnace starts with a loud boom or popping noise at ignition.

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.

Possible Causes

Dirty burner, Incorrect electrode gap, Low gas pressure, Slow-opening gas valve

Safety: Delayed ignition can be dangerous; stop using the furnace until checked.

Turn off furnace: Switch off power and gas supply.
Inspect burner and electrodes (professional preferred): Clean burner ports and check ignition electrode position and condition.
Check gas supply: Have a gas engineer verify inlet pressure and gas valve operation.
Do not adjust gas settings yourself: Only a qualified technician should adjust burner pressure or combustion.

Professional Required 5/5

Main Burner Assembly

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