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Crimson
@crimson
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Joined: Jan 16, 2024
Last seen: Nov 25, 2025
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Topics: 4 / Replies: 300
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RE: Grant 13kW Aerona3 - issues getting zones to temp

It is bonkers. Especially when the plumber says oh don’t have too big a difference between off and on temps on the zones keep to 2C diff. Sometimes ke...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

@mikefl thanks Mike. Can confirm 4 works as expected. Only 2 of the 3 zones have lights on the valves but when hot water mode comes on can see ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

It’s all rather frustrating. Far as I know Grant specifiy the use of a LLH. Thankfully I’m in a ‘fortunate’ unfortunate position. The contract f...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

I’m thinking back through the last couple months. If a valve closure could cause this issue of flow being insufficient or its primary flow v secondary...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Yeah I don’t see it being useful at this point lol. Especially as the ASHP is running at 50c and I’m not getting that through. Cost to heat ratio is h...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

So no change in heating over night. seems the 3am-4am hot water run worked as that’s sitting at 45c 3.5 hours later. So least we have that. ...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Apologies for string of posts but putting down findings soon as I have them. as was messaging plumber changed second pump speed up one. That then se...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Plumber is going to contact Grant it seems. Just very odd only top left pipe to LLH is hot. All other pipes cool to touch. Can’t workout where t...

2 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

No chance of heating. Top left pipe not getting heat whatsoever. Which explains why rads never warm. It’s been nearly 3 hours so I’d expect some rise ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Yeah not quite sure what’s going on with the flow. Interestingly now I’ve been given more of a tour the flow rate is on the bottom right from the bott...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

So no call from Grant yesterday. So I rang up this AM and was told if engineer visits Monday and it’s not manufacturer fault it’s £150 plus £60 an hou...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant 13kW Aerona3 - issues getting zones to temp

Plumber's been. Changed fuse for hot water panel, nothing going to it, so that's now on the electrician to come. I asked about the valves closed -...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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