HI all.
I have a Vaillant VCW ( I think) it is probably 30 years old or so. Hot water works fine. I changed it to a digital thermostat about 2-3 years ago, but recently it seems there is some kind of "inbuilt" thermostat on the Boiler. In short, i've had two separate engineers come who couldn't get the heating to come on and said it can't be repaired. I was about to fork out £4k on a new boiler, and all of a sudden it suddenly came on and worked fine until it got warmer and then it seems to stop working again.
Is there any reason why the heating is not coming on in summer/spring months? There doesn't appear to be any buttons i can see.
An engineer tried to disable my digital thermostat and a direct connection and the heating still wouldn't come on.
Any advice appreciated! It's getting a bit chilly now so would like it sorted asap. As a bonus my heating costs have surely gone down!
Just to add, hot water works without fault and it is fully filled with water etc.
Pic below:
https://imgur.com/a/Try4v0k
Thanks
I have a Vaillant VCW ( I think) it is probably 30 years old or so. Hot water works fine. I changed it to a digital thermostat about 2-3 years ago, but recently it seems there is some kind of "inbuilt" thermostat on the Boiler. In short, i've had two separate engineers come who couldn't get the heating to come on and said it can't be repaired. I was about to fork out £4k on a new boiler, and all of a sudden it suddenly came on and worked fine until it got warmer and then it seems to stop working again.
Is there any reason why the heating is not coming on in summer/spring months? There doesn't appear to be any buttons i can see.
An engineer tried to disable my digital thermostat and a direct connection and the heating still wouldn't come on.
Any advice appreciated! It's getting a bit chilly now so would like it sorted asap. As a bonus my heating costs have surely gone down!
Just to add, hot water works without fault and it is fully filled with water etc.
Pic below:
https://imgur.com/a/Try4v0k
Thanks