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DavidB
@davidb
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Eminent Member
Joined: Jan 30, 2026
Last seen: Mar 2, 2026
Profile Activity
Topics: 3 / Replies: 34
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Reply
RE: Mitsu PUHZ120Y 'Outdoor Temp 'error?

Hi David, I have no knowledge of your brand of HP. I have a Vaillant Aerotherm and the instal instructions make it very clear the outdoor temperature...

3 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@judith thanks Judith. Confirmation appreciated. The Vaillant guy did say it will come on when deactivating “away” but the rest was not what I expec...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@jamespa Hi James, I suspect you have got your head around the HP essential logic. I am still going up a very steep curve. interesting you mention...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@jamespa Thanks James, that makes more sense. Having said that, if it’s not actually heating why allow the orange glow to light up? No need to respo...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@jamespa Yes, it was on at midnight. My confusion was when, at 22.00 and the system started to reheat, I tried to turn it off again for 2 hrs. I se...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@jamespa Thanks for your considered response. 4 options is well past what I thought possible. Anyway I have gone simple just now, partly to get exper...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant app under reporting flow temperature

@bengeo yes

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant app under reporting flow temperature

Hi Andy, finally I have done the flow temp check and both Senso Comfort and Live Monitor show the same flow temperature. In my case it is currently ...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Need help maximising COP of 3.5kW Valiant Aerotherm heat pump

@jamespa Hi James, previously you have suggested invoking the inactive mode on my system (which I have done) and then turning off my heating when our...

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant app under reporting flow temperature

@jamespa Thanks James, that is really helpful. Can I assume that, by monitoring the power used in the status tab, I know the defrost cycle is actuall...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help needed to adjust weather compensation on Vaillant air source heat pump

@martinrobinson Thanks Martin and apologies for no earlier response as I have only just seen your post. Maybe I am just getting used to the way this ...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant app under reporting flow temperature

Hi Andy, I have queries on my flow temperature which are not dissimilar to yours. I have been wondering why my flow temperature seems low when compa...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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