Last seen: Dec 26, 2025
@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 ...
I am using my Powervault electricity monitoring App to monitor the electrical power, and I have calculated the heat transferred from the heat pump usi...
@grahamf It is not cycling, it ran constantly for 5 hours and then only dipped by 2 or 3 degrees for 10minutes. See attached report
Latest Posts
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RE: ASHP sizing - value of Heat Transfer Coefficient
Sorry, but I cant see what the point of this is unless ...
By JamesPa , 15 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
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By Toodles , 19 hours ago
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RE: Ecodan unable to hit legionella target temp - what's the consensus?
UPDATE: Thanks everyone who commened with suggestions h...
By 9jwr9 , 23 hours ago
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How long will your energy contract last?
Some heat pump tariffs don’t run as long as a heat pu...
By Toodles , 3 days ago
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@morgan They are unsupervised these days, can’t get the...
By Toodles , 3 days ago
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RE: Setback savings - fact or fiction?
Exactly. We only need to compare conditions, to decide ...
By cathodeRay , 4 days ago
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RE: Balancing financial efficiency and comfort using the Octopus Cosy tariff
I found because I have very low heat loss I can set bac...
By RadWhisperer , 4 days ago
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RE: Need Help Optimising My Rushed ECO4 Install: 12kW Bosch Heat Pump
Welcome @mickamills We too have an oversized 12kW Sa...
By Old_Scientist , 4 days ago
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RE: My Powerwall 3 Consumes 3-4 kWh/Day in Self-Consumption: Is This Normal?
@caron I can confirm that the power usage of the PW3 is...
By Old_Scientist , 4 days ago
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RE: Speedcomfort radiator fans
Thats true, but having tried (and succeeded) in constru...
By JamesPa , 5 days ago
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RE: Solis S6-EH1P8K-L-PLUS – Why I Chose It and What I’ve Learned So Far
@bash brilliant, thanks for the feedback
By energy9165 , 5 days ago
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RE: Heat Pump Heats the House… But It’s Not Cosy. Emitter Changes or System Tweak?
@alastair There I was, feeling grumpy, he said “Cheer u...
By Toodles , 5 days ago
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RE: Grant Aerona: Is there a setting to keep the 2-port valve open during pump blockade
Depends on OAT. Mine cycles at OAT>10 and of course...
By JamesPa , 5 days ago
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RE: New Fogstar 15.5kWh upright solution
@transparent My conclusion is as you have noted, tha...
By Bash , 5 days ago
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RE: Mitsubishi Ecodan R290 10kW performance
And to you too. Wishing you a very enjoyable festive s...
By Sheriff Fatman , 5 days ago
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RE: External pipework insulation
They do? But that isn't apparent from the photos we'r...
By Transparent , 5 days ago
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RE: Say hello and introduce yourself
@velcro welcome to the forums. Please feel free start a...
By Mars , 6 days ago
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Daikin EDLA11D3V3 DHW Settings
I have a newly installed EDLA11D3V3 which I'm still get...
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