IVT Delayed ignition / burner light-off noise

Furnace makes loud banging or booming noise at startup

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 assembly, Incorrect gas pressure, Misaligned ignition electrode, Partially blocked heat exchanger

Safety: Turn off power and gas. Do not continue to operate a furnace with delayed ignition.

Inspect burner: Remove the burner access panel and visually inspect the IVT burner for rust, debris, or misalignment. Do not bend or drill burner ports.
Check ignition electrode: Ensure the electrode is positioned correctly relative to the burner per the IVT manual and that the ceramic is not cracked.
Schedule professional service: A technician should clean the burner, verify gas pressure, and inspect the heat exchanger for blockage or damage.

Professional Required 5/5

IVT burner assembly

Check Price on Amazon

We may earn a commission from links on this page.