If your heating is staying on when you don’t want it, or running all the time, there are several initial checks you can do to try to sort out the problem:
- Look at the programmer. Is it set correctly? Not switched to permanently ON (It’s surprising how often helpful friends, relations etc alter the programmer settings!)
- Is the programmer clock set correctly (we often find them to be 12 hours out ie midnight is set at 12 am)?
- If you have a system with a hot water cylinder look at the valve. Is it making more noise than usual?
- Look at the room thermostat and check its setting. Try turning it right down to see whether this makes a difference.
Maybe an issue with a valve?
This type of problem is often caused by a fault with a valve. If there are 2 valves in the airing cupboard (normally grey boxes with a wire running to them) these are prone to failing but leaving the heating (or the hot water) running continuously. See my comments on valves in November 2019. Combi boilers have a similar valve inside the boiler but these rarely if ever leave the heating permanently on.