British Gas 330 Boiler Costing me a fortune when switched off

[Chris009]

Hi,
I have a Glow Worm 330 heat only boiler installed in an outhouse that has a frost protection system that kicks in to stop the pipes from freezing. It has been using between £6-£7 of gas a day when I have been away with work.

It's currently -4 degrees so I don't think I can turn the boiler off as the pipes may freeze. It's insane how much the bills are considering I'm not even home and the heating is switched off.

I know there is a frost protection thermostat in the boiler that is meant to fire if the temperature drops below 8 degrees. I also have a pipe thermostat on the return that is meant to turn the boiler off when the water in the system hits 10 degrees. The issue is that the temperature in the house is 15 degrees and the heating is coming on and the radiators are warming up.

Is there a fault? Any guidance on how to reduce gas usage would be greatly appreciated as it costs me a fortune to not have the heating switched on.

Many thanks!

 

[stem]

HI Chris

You've posted this twice, so I've replied to your other post in Plumbing and Central heating forum. If you have two posts going on the same topic it can cause a lot of confusion and duplicated effort.

 

[Chris009]

My apologies, my first post was placed in the wrong forum in error.