Klimosz Delayed Ignition

Boiler ignites with a loud bang (delayed 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

Incorrect ignition electrode gap on Klimosz burner, Low initial gas flow, Dirty burner head, Slow-opening gas valve

Safety: Delayed ignition can damage the boiler. Turn off the boiler and have it inspected.

Inspect ignition electrode: Check position and gap relative to the burner as per Klimosz specifications. Clean and adjust if necessary.
Clean burner: Remove soot and debris from the burner surface and ports.
Gas valve check: A technician should verify gas valve opening characteristics and adjust if needed using proper instruments.
Do not ignore: Continued operation with delayed ignition can crack the heat exchanger or damage seals.

Professional Required 5/5

Ignition Electrode / Burner Assembly

Check Price on Amazon

We may earn a commission from links on this page.