Joining the Renewable Heating Hub forums is completely free and only takes a minute. By registering you’ll be able to ask questions, join discussions, follow topics you’re interested in, bookmark useful threads and receive notifications when someone replies. Non-registered members also do not have access to our AI features. When choosing your username, please note that it cannot be changed later, so we recommend avoiding brand or product names. Before registering, please take a moment to read the Forum Rules & Terms of Use so we can keep the community helpful, respectful and informative for everyone. Thanks for joining!
Last seen: Mar 25, 2026
@jamespa No cycling, flow temp varies by less than 2 degrees, return is very stable. Today it is running at 38C varying by less 2C, since water heatin...
@jamespa Here's an update to my previous post. Mitsubishi engaged a subcontractor to investigate the poor performance of my heat pump. He concluded th...
@cold123456 Mitsubishi has failed to respond to my complaint. On 16 November I sent a formal complaint to Mitsubishi specifying that they had suppl...
@editor I was surprised to read your praise for Mitsubishi for remote connectivity and telephone support for diagnosing problems. Here's my experience...
@jamespa That is an acceptance by the installer, the problem is with Mitsubishi, it is their unit that is faulty. They have required payment to invest...
@jamespa Time for an update. My installer has been to visit and has confirmed that the heat pump is faulty. He has contacted Mitsubishi. They have req...
@jamespa I agree, I have the installer visiting tomorrow. Unfortunately Mitsubishi will not engage with me and insist that they deal with the installe...
@sheriff-fatman Thank you. Like you I am not chasing a particular COP, I am using COP to demonstrate the poor efficiency and hence the high cost. I ha...
@dgclimatecontrol I only have 1 cylinder and I can confirm that the Ecodan is set to standard, which I understand means that the heat pump alone heats...
@dgclimatecontrol I am on an Octopus Intelligent Go Tariff, so I tend to heat my water when that starts and then heat the house for the remaining dura...
@jamespa Thank you, just need to get it fixed!
Thank you for the responses. 3.4kW is in line with calculations and data that I collected last winter before having the heat pump fitted. I don’t ...
SPONSORS
Degrees of Separation
Latest Posts
-
RE: Heat pump branding. Clever, contemporary… or a bit too much?
I think Heat Geek have done an amazing job on their bra...
By Tomtheheatingengineer , 9 hours ago
-
RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
I have just had 3 heat loss surveys, one by heat geek o...
By David , 9 hours ago
-
RE: Heat Geek Zero Disrupt: Are We Sleepwalking Into Another Race to the Bottom?
I think that's the key question. After all inverter uni...
By Prunus , 10 hours ago
-
RE: battery storage without solar
As of October 1st they need specific qualifications to ...
By EtchedPixels , 11 hours ago
-
RE: How should the Boiler Upgrade Scheme be reformed?
A unit which uses water to transfer the heat/chill from...
By Temperature_Gradient , 12 hours ago
-
RE: Renewables & Heat Pumps in the News
With regards to the BUS grant raid, I gave it more thou...
By ASHP-BOBBA , 12 hours ago
-
RE: Why are ASHP installs so expensive?
The whole system seems to work on the basis of...
By ian33a , 12 hours ago
-
RE: Missing flow temperature in Heat Geek proposal
Good plan. If you can get half hourly meter readings a...
By JamesPa , 17 hours ago
-
RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?
@editor Most certainly. The heat pump was an ideal s...
By Abernyte , 18 hours ago
-
Although regulations may well vary from country to coun...
By Majordennisbloodnok , 18 hours ago
-
RE: Does anyone have experience of a smart water meter?
Yep I caught our slow leak from a £100 bill rise 8)
By EtchedPixels , 18 hours ago
-
RE: Do You Need a Buffer Tank or Low Loss Header for Underfloor Heating in a Large Property?
@jamespa in some cases, failing the Turing test might b...
By GrahamF , 21 hours ago
-
RE: Passiv Smart Thermostat - Help & Forum Support
@energystoragetech The heat capacity of some...
By JamesPa , 23 hours ago
-
RE: tepeo ZEB UK Support & Info Thread
Sorry you are correct, I was remembering figures from t...
By JamesPa , 1 day ago
SPONSORS
