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Ecodan consuming 100kwh per day in new build!!!

 
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Air Source Heat Pumps (ASHPs)
Last Post by Morgan 2 hours ago
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 anca1808
(@anca1808)
Active Member Member
Joined: 4 months ago
Posts: 9
Topic starter 03/07/2025 9:52 pm  

Hey all, 

 

I just wanted to put in an update and again ask for some advice. 

I got my radiators changed upstairs to a bigger size - thinking that was the issue.  

Mitsubishi engineer came out in May. He found several flaws with the installation but did not hand me to have the report as I did not pay for it. The developer paid for the callout. He fixed some pump attached to the cylinder. The night he came he got the heating working full blast upstairs and the heat pump stopped making the high pitched noise. The second day, things were back to where they were. No heating upstairs, high consumption ( COP of 3 at very very best with super hot weather), horrible noise coming from heat pump etc.

After another 2 months of calls and emails, I decided to log in a complaint with NHBC and call my solicitor. The developer then rang me and said he has no clue what to do / how to repair it and he does not understand what mitsubishi is suggesting. He said he only installed the heat pump as he was building the house for himself and he was advised it is the best option, but his gas engineers have no experience with renewable enenergy. He is willing to swap my heat pump for a gas boiler....

Well isn't that going backwards and sideways? Seems like a waste, but then again it is not working as it should and I am very panicked like in game of thrones that winter is coming and I will have an 11 months old freezing in his bed and pay about £500 /week for this scenario. 

I am reluctant to keep the heat pump, simply because the Mitsubishi Engineer that came made a comment about the high pitched noise " i've never heard one so loud. I have updated the system, but I was advised by techical team that if the noise comes back, then the unit needs changing". 

Heat pump is out of warranty ( explanation is somewhere in my posts above). So I will be out of pocked by a lot if I want to keep it and get everything fixed / changed .  I assume a new pump plus fixing is around 10k, even after grant?) . Developer is reluctant to do that as he said he can't fix it if anything was to go wrong as his people are unexperienced .He will sort out a gas boiler . 

 

What do you guys think? what would you do? get the gas boiler if you were in my shoes?Take into account  I have no money spare as I just bought the house and have a newborn, so can't really be spending what I do not have... 

Many thanks, 

Anca

This post was modified 11 hours ago 2 times by anca1808

   
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Morgan
 Morgan
(@morgan)
Noble Member Member
Joined: 4 years ago
Posts: 618
04/07/2025 7:28 am  

@anca1808 

It's a shame to say it but if I were in your position under your circumstances I would snap his arm off for the gas boiler option.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.


   
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