Boiler Shutting Off - Cooling Down Too Much?

scottwhittaker · Dec 11, 2017

Hi
We have a GlowWorm Betacom 24c and we have it set to the maximum CH temperature at this time of year. It ranges from 30-90 on the boiler. Just wondered if it was normal for the boiler to switch off after running at 80-90 for a while (minutes) and then switch off and let itself cool right down to the 50 light before kicking back in and heating back up? Could the boiler thermostat be on its way out or something or is this normal?

Last winter it was actually cooling right down to 30 before kicking back in and warming back up. Just before winter it was drained, flushed through with the mains, had a fernox magnetic filter fitted (getting a lot of black crap out with this!) and refilled but it still seems to let itself cool down to much for me or am I just plain wrong ha?

Also is it normal for my CH flow to go upstairs first? I find this very odd also! Its a single pipe system and is a relatively small setup really, two large radiators downstairs with a little one at bottom of stairs and two medium radiators upstairs with a little one in the bathroom.

Thanks!

quality · Dec 11, 2017

sounds like you need an engineer to look at your issues

Chalked · Dec 11, 2017

It's to stop the boiler cycling. ( turning on and off to much). It saves fuel.
It can be reduced. But best getting someone with experience to do this.

Chalked · Dec 11, 2017

Also your system, being a one pipe will not disperse heat fast enough for a modern boiler. As he return water comes back too fast.

scottwhittaker · Dec 11, 2017

Chalked said:
It's to stop the boiler cycling. ( turning on and off to much). It saves fuel.
It can be reduced. But best getting someone with experience to do this.

If it sounds fairly normal I'm happy for it to do it just wanted to check really. I guess if it kicked in again at 80 or even 70 it would wear itself out twice as quick.

Is it normal (sometimes) for the CH flow to go upstairs first? This does seem odd given the heat from downstairs would naturally rise upstairs so it would make sense to give priority to downstairs?

Im not trying to attempt a self repair here just don't want to call someone out and pay to be told everything is fine and normal! We have heat so there is no issue with the CH. Just curiosity really.