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: Aug 13, 2025
My Mitsubishi does exactly the same as David's above, there wouldn't be enough volume of water/heat in the primary circuit alone to defrost the heat p...
If you want to check what your pump speeds are set to here is the video, they can be set to 1-5 for heating and DHW as others have said 17L is low for...
@hillswick if you engage more radiators then it will take longer for the flow and return temps to stabilise so the heat pump will run harder. what f...
@davidnolan22 Nice out of interest do you know how much power it pulls at that temp at 32C my 8.5KW unit pulls about 800W
@davidnolan22 good spot, that should probably be ideally removed not needed for a heat pump. Needs to be set so it doesn't do anything if possible. ...
@sandman1600 If you unscrew all of the actuators then the circuits will always be open regardless of what the thermostats are doing, then you just ...
@sandman1600 Control logic is either auto adapt, weather comp or fixed flow you want weather comp the graph symbol in the image below What is tell...
You don't say what flow temperatures you are running at, are you using weather compensation or a fixed flow temperature? What are the flow and retur...
@sandman1600 What controller do you have there are good videos from mitsubishi on how to set weather compensation, I will assume you have an FTC7 cont...
If you have a Mitsubishi wireless controller then it should be set to Room RC not Main RC, if you use Main RC it will now be using the main controller...
That is the target room temperature and if its showing -20C then its not getting a temperature signal from the thermistor. Are you using the main co...
Latest Posts
-
RE: Renewables & Heat Pumps in the News
@editor, I hear that too. I can confirm that out of ...
By ASHP-BOBBA , 7 hours ago
-
End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
As many of you know, our Global Energy Systems heat pum...
By Mars , 7 hours ago
-
@derbygraham fully agree with James, and it’d be good t...
By Mars , 7 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Finally got around to installing and setting up the Sol...
By Mars , 7 hours ago
-
Unfortunately its a function of the physics. Max heat ...
By JamesPa , 8 hours ago
-
RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 9 hours ago
-
RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 10 hours ago
-
There are just too many unknowns for me to comment on p...
By Transparent , 12 hours ago
-
RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 12 hours ago
-
RE: Brand and installer questions for ASHP
Strange, perhaps it doesnt use modbus which the third p...
By JamesPa , 14 hours ago
-
RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 17 hours ago
-
RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 20 hours ago
-
RE: Mitsubishi Ecodan not good enough ?
Thanks @goody, appreciate the feedback and sorry you ha...
By marcexec , 1 day ago
-
RE: Minimum and Zero Disrupt Heat Pump Installations
True (first sentence) Thats the reason to consider th...
By JamesPa , 2 days ago
-
RE: High air source heat pump running costs – Vaillant AroTherm Plus
Quite right. I was using a rough guesstimate of doublin...
By Majordennisbloodnok , 2 days ago
-
RE: My Grant R290 9kW Heat Pump Installation
Again, really don't know how accurate this is! &nb...
By petch , 2 days ago
-
RE: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
@toodles The whole scheme is a shocking waste of money....
By Papahuhu , 2 days ago
-
RE: Anyone concerned about GivEnergy?
Many thanks for your, and the subsequent, answers tk qu...
By KevH , 2 days ago
-
RE: DIY or Don’t Touch? Solarman Smart Meter Install
Yes, and these guys would probably be my preferred inst...
By Batpred , 3 days ago
-
RE: Hot water tank lose heat rapidly on random days
@jamespa Hopefully their reasons are well intended! ...
By Bash , 3 days ago
-
RE: Ecoflow UK Support & Info Thread
As mentioned above, we’ve got our full review of the Ec...
By Mars , 3 days ago
-
RE: Say hello and introduce yourself
@sonosppp welcome to the forums. I see you've posted in...
By Mars , 4 days ago
-
RE: Guidance with installing a new heating system
@bobflux Great, thanks for the advice. The pipe has an ...
By Hamilton , 4 days ago
-
RE: Daikin Altherma 3 LT compressor longevity question
@optimistic-optimiser I have has a Daikin for a few yea...
By madsid , 4 days ago
-
RE: UK DIY Battery: SEPLOS 48V 200Ah x2 + Sunsynk 8K – Safe Installation for Garage Conversion
The rule of thumb is to ensure that you can isolate any...
By Transparent , 4 days ago
