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bobshopsupreme
@bobshopsupreme
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Eminent Member
89 kWhs
Joined: Dec 29, 2022
Last seen: Nov 7, 2024
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Topics: 1 / Replies: 10
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

@editor We have a 200 litre buffer between the hydraulic station and the radiator and underfloor heating circuits. The flow rate problem was due to un...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

@editor Hello. Yes and no! The original problem was indeed a dead water pump, killed by contamination in the circuit and possibly the power cut during...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

@william1066 Interesting. I don't see anything in the Vaillant manuals about this. I live in France and the EU version of the Vaillant DHW cylinder do...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

Quick update for the sake of completeness. Still no full resolution to this problem. The installer replaced the pump, and the system would still not s...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

I think you may be right, but I don’t think I’m going to win the argument to start replacing other components while the error is pointing to the pump....

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

Thanks for all the suggestions. Quick update - system still not working. The installer had cleared the pump error by replacing it with another pump ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

@alec-morrow That’s a completely fair point and I didn’t mean it as a slight. The installers have done a great job on the initial installation but by ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788 - ASHP is not working!

Thanks for the suggestion. I'll add it to the list. The strange thing is that the unit no longer shows this error or any others. The app shows a Fl...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788

Quick update as the despair continues. Installer was there 5 hours today (I was not), and he has got the pump working, which he said was complet...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Vaillant Arotherm monobloc error f.788

Thanks very much for such a quick reply. I'm not at the house but the installer is calling past this afternoon and I'll pass on the suggestions. If he...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Vaillant Arotherm monobloc error f.788 - ASHP is not working!
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 30
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