Heatline Monza 24 boiler F4 error code

Hi All,

I have a Heatline Monza 24 boiler, which is almost two years old. From last 2-3 days, the boiler is showing a F4 error code on its control panel. I have read the user guide in order to fix the problem but I think I am missing something. Has someone faced this issue if yes then, please help me

Looking for help



Hi Lynn,

A F4 error code indicates a problem with the ignition. You have to check the conductor either it is sparking or not. Moreover, the working pressure of the gas inlet has to be around 20mb. Also, check that a condensate trap device is not wet or damp because it will stop the boiler from igniting. If everything appears fine after checking the mentioned things, please refer to a component analysis sheets for necessary checks all around the gas controller.