Central Heating

Help - Central heating only working intermittently but hot water is fine, what can I do to identify/resolve fault?

Anonymous user 23/02/2024 - 2.44 PM

Hi, Thank you for taking time to read this, and hopefully help. I have gas central heating and hot water. Over the last few days the central heating has only been working intermitently and I'd like to see if the issue can be identified (and repaired ecconomically if possible). The hot water appears to be unaffected by this problem as the boiler responds immediately when the hot water is switched on via the timer box. Using the same timer the heating will initially switch on and trigger the boiler however it has begun to switch off within 5-10 mins of the boiler starting and only reigniting a couple of times during the day. Turning up the thermostat generates a 'click' but the boiler does not respond. At times over the weekend we have had the thermostat set to 35C with no response from the boiler, and it really hasn't been anywhere near 20C let alone 35C. We have tried resetting the boiler and shutting down the whole system but nothing has worked. We cannot work out why the heating only appears to identify that the temperature is below the level set on a few occassions during the day and ignite the boiler but not maintain that level. For example, one day last week the heating operated fine until 5pm when it failed to respond to any changes in temperature for the rest of the evening and allowed the house temperature to drop despite altering the thermostat. Nothing we tried could induce the boiler to switch on. Is there anything we can do to test where the fault is? Or for those of you with experience of CH systems, is it obvious where the fault lies? and can we easily repair? Thank you again.