Last seen: Jul 10, 2025
Im not sure what you are monitoring but defrost is normally done by switching off the fan reversing the direction of refrigerant flow so the heat ...
If your ASHP has both a pressure sensor internally and isolation valves and you also have a pressure sensor one on the expansion vessel then you can i...
I would actually (and reluctantly) challenge the assertion that its fixable (it can probably be improved however). There are rogue traders throughou...
Agree with @mars. There is also a diagram in the Vaillant installation manual. Careful with condensate - it freezes so you really don't want it runn...
I'm surprised by this. Is it 2 port or 4 port?
My fridge and freezer seems to do at least one per hour, 8000 per year. Just saying!
Just checked mine. 543 starts from mid November to now. So, generously, 1000 per year unless I use if for cooling in summer. 20 years seems a reaso...
@judith Thanks, Ill give it a go. Given the tight hysteresis do you turn up the target temperature a bit to ensure it switches back on early enough ...
My Vaillant definitely has a 'Max outside temp for heating' parameter. What it doesn't have, unfortunately, is a 'Max solar irradiance for heating' ...
Good to hear this, sensible to set the WL2 curve the same as WL1 for now also, avoids any ambiguity. Sun and south facing windows can be a mixed bag....
Obviously without knowing how it is set up its impossible to comment on this. It seems your installer left it with settings that didn't work for you....
Sorry but without more complete information its impossible to tell what is going on. Screen shots of the controller when its operating (making sure a...
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