Forums

Forums
Renewable Heating
Air Source Heat Pum...
F.788 Building circ...
 
Notifications
Clear all

F.788 Building circuit pump reports internal fault - Vaillant Arotherm

 
Air Source Heat Pumps (ASHPs)
Last Post by jeegnesh 12 months ago
7 Posts
2 Users
2 Reactions
999 Views
RSS
 jeegnesh
(@jeegnesh)
Reputable Member Member
Joined: 1 year ago
Posts: 99
Topic starter 08/03/2025 5:14 pm  

I spoke to soon and thought everything was going good.  Vaillant Arotherm+ 10kw installed mid Oct 2024 so 5 months old and woke up to see this error on the app F.788 Building circuit pump reports internal fault

I did try reset same error along with compressor blocked.  I cleaned the magnetic filter and the other mesh filter as advised by my installer, there was a small about of build up, not terrible.

Restart and back to the same error.  I have booked a Vaillant warranty visit but not happening till end of the week, just wondering if anyone else has run into this, pretty disappointed right now.


13.6kw Solar, 40kw Battery, 10kw Heat Pump and EV Cars


   
Quote
Topic Tags
F.788
Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2574
08/03/2025 5:27 pm  

I take it that ‘the other mesh filter’ is the ‘Y’ strainer filter? Regards, Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
ReplyQuote
 jeegnesh
(@jeegnesh)
Reputable Member Member
Joined: 1 year ago
Posts: 99
Topic starter 08/03/2025 5:30 pm  

@toodles yes it’s the strainer plastic with metal mesh the one you use your finger to pull out and only fits one way.


13.6kw Solar, 40kw Battery, 10kw Heat Pump and EV Cars


   
ReplyQuote



Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2574
08/03/2025 5:37 pm  

@jeegnesh Then you are pretty much at their mercy until they can send that engineer aren’t you?😒 Toodles.


This post was modified 12 months ago by Toodles

Toodles, heats his home with cold draughts and cooks food with magnets.


   
😢
1
ReplyQuote
 jeegnesh
(@jeegnesh)
Reputable Member Member
Joined: 1 year ago
Posts: 99
Topic starter 08/03/2025 5:52 pm  

After bleeding and then topping up water is there anything needs bleeding?


13.6kw Solar, 40kw Battery, 10kw Heat Pump and EV Cars


   
ReplyQuote
Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 2574
09/03/2025 10:17 am  

@jeegnesh I take it that the ‘topping up’ is the opening of the two valves on the red pressure tank (until the gauge indicates ~1.5 bar, usually indicated with a red line) and then closing the two valves again? I’m not aware of anything else that needs doing after that. Regards, Toodles.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
👍
1
ReplyQuote



 jeegnesh
(@jeegnesh)
Reputable Member Member
Joined: 1 year ago
Posts: 99
Topic starter 09/03/2025 9:30 pm  

Guess I have to wait for engineer visit. I really hope they come with a pump in case it is the fault. 


13.6kw Solar, 40kw Battery, 10kw Heat Pump and EV Cars


   
ReplyQuote
Forum Jump:
  Previous Topic
Next Topic  
Topic Tags:  F.788 (1) ,



Share:

Join Us!

Worth Watching

Latest Posts

Click to access the login or register cheese
x Powerful Protection for WordPress, from Shield Security PRO
This Site Is Protected By
Shield Security PRO →