Heatline Monza 24 error code F20


I have a Heatline boiler,  Monza 24 model, it is about 5 years old and it is showing error code F20. I tried resetting- didn’t help. Pump is not spinning after starting the appliance. Any idea how to fix it fast?



Hi Dan

F20 fault code stands for overheating. First check if the system pressure is around 1.5 bar, if not refill the system. If that is not the case you will need to call a Gas Safe Register Engineer to have a look at your appliance as it may be PCB, pump or one of the fuses.