Can anybody help? I changed my boiler to a Biasi Garda HE 28 fitted about 6 months and everything worked as it should. Now for some reason when I run the shower the hot water heats up and works fine for about 2 minutes and then goes stone cold. After about 30-40 seconds the water heats up again and works for about 2 mins then goes cold again. This repeats itself all the time the shower is on.
I have noticed that when the shower is turned on the temperature gauge that is sensing the temperature of the primary circuit starts to rise from about 30 degs and reaches about 75 degs then cuts out the burner, the water runs cold, the temp drops to around 30 degs and then the burner fires.
The burner on the boiler only seems to have two setting they are full on or off. Is this normal? Or should the flame size vary in size.
Does modulation mean turning the flame steadily up and down appropriately or just on and off
To complicate things further if I turn the bath tap on full I have lots of flow and pressure, the water only get warm not hot. Looking at the temp gauge it reads about 60 degs with the burner on full. If I turn the tap down slightly the water gets hotter and the temp gauge rises. If I turn the tap down some more (still ok flow though) the water gets that hot that the gauge reads about 75 degs and the burner goes out, temp drops to about 30 degs and the water gets hot again just like the shower.
I’m pulling my hair out now. Any ideas please help.
I have noticed that when the shower is turned on the temperature gauge that is sensing the temperature of the primary circuit starts to rise from about 30 degs and reaches about 75 degs then cuts out the burner, the water runs cold, the temp drops to around 30 degs and then the burner fires.
The burner on the boiler only seems to have two setting they are full on or off. Is this normal? Or should the flame size vary in size.
Does modulation mean turning the flame steadily up and down appropriately or just on and off
To complicate things further if I turn the bath tap on full I have lots of flow and pressure, the water only get warm not hot. Looking at the temp gauge it reads about 60 degs with the burner on full. If I turn the tap down slightly the water gets hotter and the temp gauge rises. If I turn the tap down some more (still ok flow though) the water gets that hot that the gauge reads about 75 degs and the burner goes out, temp drops to about 30 degs and the water gets hot again just like the shower.
I’m pulling my hair out now. Any ideas please help.