Combi randomly turning on and off

steppevos

I am with Rubidium: I wonder if one of your neighbours has a wireless thermostat (or something else) which uses a signal at
the same frequency. Changing the frequency will hopefully give you a unique one.

Mr.Generous

It could be something else interfering not necessarily another thermostat, good idea to try a different frequency. We are going to end up with so many radio waves in our homes we can probably close all the doors and microwave an egg.

Kiran

I've had 2 of those wireless stats in 2 different houses. They are the cheapest of the cheap. Both had issues, luckily as I had central heating cover it was swapped over for an alternative and the problem went away.