Central Heating randomly coming on

[david891]

Good morning,

Recently my boiler has started coming on at random times for central heating, heating the radiators up and making the place feel like a sauna. Woke up a few times during the night realising what was happening.

My thermostat control is a Salus RT300RF and boiler is a Greenstar 25Si Compact Combi Boiler located in the kitchen.

My thermostat is always set to 17 degrees but the boiler keep firing up the heating even when the thermostat is reading 23 Degrees.

I have checked the boiler setting and there is no additional on/off times set its all working from the thermostat. I have also noted when the boiler is firing up the central heating the "heating" symbol on the thermostat doesnt display.

The boiler temperate indicates 32 degrees so it doesnt appear to be frost protection.

Any ideas what the problem could be?

Appreciate everyones time.

It it a wireless thermostat? Ours does this when it needs new batteries.

Ours did this it turned out someone elses setting were impacting on our. Something to do with "frequency'.

could be the room thermostat faulty, the dial tend to go faulty .

Hi OP guessing you've got to the bottom of it but if not ... ours has two temperatures programmed in. The first (comfort) is the temp it aims for when it turns on, so 19ish degrees. It also has a "comfort" temperature (we've set it to 14 degrees) which is the minimum temp the thermostat gets to before turning itself on when it's not set to come on.

We've had a few nights since it's been really cold that it's turned on I'm assuming coz the temperature has fallen to that.

This has reminded me I need to set the comfort to lower