Heating on 24/7 because of frost prevention measures?

Astria

Sea_Shell said:

Is frost control a two stage process on modern condensing boilers?

We've heard ours in the early hours, but on checking the IHD in the morning it's not used any gas.

So assume it's just the pump to keep the water moving.

The boiler is in the integral garage.

Would it fire up the burners if it got even colder? 

Mine used to fire the pump up if the boiler hadn't been used in a while to get a true reading of the water temperature and only fire up the boiler if the water was considered too cold.

Since Monday however the boiler fires up so often (at least every hour) to actually provide heating that it's internal checks don't seem to be done.