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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Jan 11, 2026
Profile Activity
Topics: 20 / Replies: 3890
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RE: Vaillant aroTherm not heating with many faults

@anon67 Sorry I cant help. The only 'lead' you might follow is the fact it works for DHW. The faults look like they would affect DHW also but a...

19 hours ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump not reaching flow temperature

@davec Ive had a look at the screenshots. Lots of the parameters are things you wouldn't want to touch but: Im guessing H43 and H44 are the two F...

1 day ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Vaillant aroTherm not heating with many faults

When I had a series of apparently unrelated faults my installer turned up, checked the flow rate using the test menu, and cleaned the filters (two - a...

1 day ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump not reaching flow temperature

At this stage I would say no as gross underestimation of the loss is not the most likely cause of the problem. More likely causes are (a) the heat...

1 day ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Recommended home battery inverters + regulatory matters - help requested

I cant see how that is the case if the earth is provided by means of a bond to the metal outer sheath of the incomer; no cut (other than one in your d...

1 day ago
Forum
Energy Storage
Reply
RE: Recommended home battery inverters + regulatory matters - help requested

Thanks for the clarification.  

1 day ago
Forum
Energy Storage
Reply
RE: Considering MLCP (Multi-Layer Composite Pipe) for ASHP

OK, TBH I dont know enough about MLCP to comment with any authority. The simple message so far as I am aware is: Nothing inherently wrong with plasti...

1 day ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Heat pump not reaching flow temperature

Peak Energy Products most recent accounts (to June 2024) make interesting reading. Im not an expert by any means, but their assets are almost entirel...

1 day ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Considering MLCP (Multi-Layer Composite Pipe) for ASHP

To answer this properly you need a heat loss calculation. Then you can work out how much flow each radiator needs which will tell you what diameter p...

1 day ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Heat pump not reaching flow temperature

Definitely please!   Is that a plate heat exchanger above the bucket. Can you tell whether it is connected to the DHW or to the space hea...

1 day ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump not reaching flow temperature

Firstly welcome to the forum. From the preceding posts on this thread you may have gathered that this unit appears not to 'expose' the key parameter...

2 days ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Recommended home battery inverters + regulatory matters - help requested

On reflection your description (which I understood) made more sense than the diagram (which I don't). The diagram seems to have two contacts/switc...

2 days ago
Forum
Energy Storage
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