Diagnosing a "Check Ignition Module" error on VFC and SL boilers

Changing the fuel mixer on an SL 26-260 G3 boiler

Changing the burner on an SL 26-260 G3 boiler

Replacing the fan on an SL 26-260 G3 boiler

Replacing the gas valve on an SL 26-260 G3 boiler

Replacing the fuel mixer on an SL 40-399 G3 boiler

Replacing the burner on an SL 40-399 G3 boiler

Replacing the fan on an SL 40-399 G3 boiler

Replacing the gas valve on an SL 40-399 G3 boiler