Please, I would like some help with my Glow-worm 18hxi boiler (2.5 years hold)
The problem?!
From cold both the heating and hot water work OK, the boiler modulate as expected. When the room and HW thermostat reach the set temperature the boiler shut down, as it should do.
However when it restart the water temperature, as displayed on the boiler, quickly raised, within 2 minutes, from approx 45 °C to 75 °C, then the boiler try continuously to modulate in very quick succession. It appears like it can not decide if to fire high or low.
Thank you
The problem?!
From cold both the heating and hot water work OK, the boiler modulate as expected. When the room and HW thermostat reach the set temperature the boiler shut down, as it should do.
However when it restart the water temperature, as displayed on the boiler, quickly raised, within 2 minutes, from approx 45 °C to 75 °C, then the boiler try continuously to modulate in very quick succession. It appears like it can not decide if to fire high or low.
Thank you
