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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...