I think @JamesPa is right… if there’s anything we can still help with, keep throwing it at us. But the bit that really sticks with me is that after nearly three years of complaints, inspections, emails, technical reviews and supposed remedial work, you’ve ended up paying another installer to sort the system anyway. That doesn’t feel like a complaints process delivering an outcome and it feels like you simply outlasted your willingness to keep fighting it.

And I don’t blame you. There comes a point where getting your heating sorted and getting your life back is worth more than another six months of emails.

One thing I would do before AE Renewables changes anything is ask them to document what they find. Nothing overly elaborate. Photos, a short summary of what they believe is wrong and what they intend to change. Not because I’m suggesting you launch another battle, but once they start correcting things, some of the evidence of the original installation disappears.

I also think Gas Worx refusing to service a system they installed deserves to be recorded here. Whatever the rights and wrongs of the wider dispute, abandoning the aftercare relationship doesn’t exactly inspire confidence.

And, for what it’s worth, this thread hasn’t been pointless. Quite the opposite. You’ve documented the buffer, noise, flow problems, debris, pump and flow switch saga, warranty discussions and the complaints process in great detail. It’s become a pretty sobering case study of what happens when an installation is basically functional but riddled with issues and nobody seems capable of taking ownership of the whole thing. 

Please keep the thread going when AE get involved. I’d genuinely like to see what they find, what they change and, hopefully, the post where you finally say “It’s sorted.”

If anyone is interested after 3 years of NAPIT dispute the case has been closed. If anyone is thinking of doing something similar dont bother with NAPIT go through the other regualtors first. Ive truly given up and am just going to pay to avoid more hassel.

The installer Gas Worx has abandoned the system and has refused to service it. And i also refuse to give them any more money to do any further work. And they only will do the work NAPIT require which they did the bare minimum of anyway.

I am now speaking with another installer AE Renewables a heat geek installer to go over sort it and re work it all to make it work. Costing a lot but is what it is im just sick of trying with the other one. 

Roll on September where hopefully my journey of problems will end

Even though they had advised against it as they used liquid PTFE and apparently it can break it down, but to appease NAPIT it had to be done. 

I have purchased some adjustable heat pump feet to get it off the wall in a hope to reduce noise transfer as they don't want to do anything about it so hopefully this may help. 

I have said to them I will pay for a radiator to change the one that was not replaced as all the debris may be coming from there... Maybe as they don't want to flush the system again. 

Been 4 days and no fault COP hovering around 450%-590% since I have lowered the circulation pump speed to 1 house still warm and the noise is basically gone from our bedroom. 

Slowly but surely getting there maybe...

Not heard back from the installer for 5 days or NAPIT for around a week, we shall see

Joys 

Will try them again soon.

Installer has been over now following a push from NAPIT.

D2 Termination was wrong

D1 is wrong but they are trying to argue they can't do anything about it so we shall see what they say. 

Replaced the pump and flow switch in the unit under warranty. Cleaned filters again... Nothing in them really 

Very next day a error flow. 

Reset and in the morning a flow error. 

Both times seems to be when it calls to do the hot water side of the system so that could be linked to something.

They are trying to blame it on homely but I've had flow errors for the whole year before that was even fitted. 

The quest to resolve this continues 

Hit and miss replies from NAPIT I'm glad my system is reasonably functional as if it wasn't and the installer was being uncooperative it would be awful. A lot of back and forward. 

I am also still completely in the dark as to what they have found or have agreed on is wrong with my system install. 

Installer is coming round finally to actually do some of those things on the 6th which is great. But they won't do anything that's wrong with it unless NAPIT have told them to do so. Or they can 'alter' thing for additional costs.

At least is seems we may be coming to the end...

Cheers for your help brother