My brothers just moved in to his house which has been unoccupied for around 2 years.
Ferroli Optimax He Plus 31C at the property, so he asked if I could go and check it out as it hasn't been used for so long.
Emissions were miles out and it was making all sorts of noises, so set them up and all was running well in test mode. Checked the dhw, and that's working fine as well. But when I turned just the C/H on, it wouldn't go above 33 degrees, even though the temperature was set to 90 degrees.
I checked the return thermistor thinking that it could be faulty and telling the boiler it's up to temperature, I was getting 8.2kohms and checked the temperature of the pipe, which was 30 degrees.
Diverter not passing, pump running fine. Checked working pressure and gas rate at max test mode, all ok.
When I first put the heating on, it ramps up as it should for about 5 seconds, and then cuts down to minimum and stays like that.
There is a 4 wire temperature sensor by the primary heat exchanger, which I guess doubles as an overheat stat as well, but wasn't sure which connections to test between, but assumed that it's ok as the hot water was heating up fine.
Any ideas or suggestions would be greatly appreciated.
And if I put it in to max test mode, the heating all works fine and all radiators are nice and hot as you'd expect, rechecked the return thermistor, which was about 1.5kohm at max temperature.
Ferroli Optimax He Plus 31C at the property, so he asked if I could go and check it out as it hasn't been used for so long.
Emissions were miles out and it was making all sorts of noises, so set them up and all was running well in test mode. Checked the dhw, and that's working fine as well. But when I turned just the C/H on, it wouldn't go above 33 degrees, even though the temperature was set to 90 degrees.
I checked the return thermistor thinking that it could be faulty and telling the boiler it's up to temperature, I was getting 8.2kohms and checked the temperature of the pipe, which was 30 degrees.
Diverter not passing, pump running fine. Checked working pressure and gas rate at max test mode, all ok.
When I first put the heating on, it ramps up as it should for about 5 seconds, and then cuts down to minimum and stays like that.
There is a 4 wire temperature sensor by the primary heat exchanger, which I guess doubles as an overheat stat as well, but wasn't sure which connections to test between, but assumed that it's ok as the hot water was heating up fine.
Any ideas or suggestions would be greatly appreciated.
And if I put it in to max test mode, the heating all works fine and all radiators are nice and hot as you'd expect, rechecked the return thermistor, which was about 1.5kohm at max temperature.
