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- 31 May 2020
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So the engineer has been, the problem is with the wiring when installer. There is a permanent live on the boiler when it should be set up to a switch live, so at the moment when there is no demand, the display still shows up when it shouldn’t do.
Looks like a sum of money to Vaillant and an electrician call out!
Depending on your choice of external controls for your boiler, there is a coice to switch theboiler on /off using 230V AC, which as you have zone valves is the best set up for your system, but if the boiler was installed with different controls there is also an option to use 24Vdc switching, the boiler comes with a link fitted to the 24V terminals and this has to be removed when using the 230V controls, but the Vaillant lad would have checked this, if you can get the front unit off the hive receiver and post a pic of the wiring so we can see what has been done, my money is on a zone valve end switch sticking thoughSorry to be a pain, what is the 24v side?
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