Had a new Vokera Mynute VHE boiler fitted 2 months ago along with a new pump and they also put in an automatic by-pass.
We have occasionally been getting an error code 74, which after re-setting the boiler, all works fine.
Over the last week had this same error code 74, four times.
Any...
I have a C.H system that is 10yrs old - with boiler in garage and hot water cylinder in 1st floor airing cupboard.
Heating and Hot Water run via a '3 Way Motorised Value' in airing cupboard.
After recently turning system off to replace an upstairs tap - ever since i've had the following...