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
From your quote here I understood that the heat pump wasn't operating at night as you have the house quite cool. In the documentation you got from yo...
@grumpidoc do you have glycol in your system if so you can deactivate the frost protection mode so the pumps won't activate at night.
Ideally you want it all to come on at the same time. When my hall thermostat calls for heat all of the UFH loops downstairs come on and all the rads ...
Yep that all makes sense the easiest solution is to remove all the actuators from the UFH manifold they should just unscrew them all loops will be ope...
So presumably the EPH thermostats are wired back to a controller near to the UFH manifold? Do you have a picture of that?
That will be the cause then, with only 1 thermostat calling for heat the water volume is too small it heats quickly and the heat pump has to turn off ...
That’s definitely cycling do you have UFH or rads regardless of which it would suggest you have only a very small proportion of the heating system cal...
They could be defrosts but unlikely at that Frequency. do you have the MELCloud app that can show the flow and retune temps for those times? There...
It’s an 8.5kw ecodan UFH and rads. WC set at 32C at 3C, 45C at -10C. Running on weather comp with thermostat set to 22C in the hallway. Once it g...
@ak2024 that is the HP cycling on and off 2/3 times an hour usually happens at milder outside temps when the flow temp is around 30C or less. I have ...
@boycey what you have there is really bad cycling 10 times an hour. if you increased the flow rate this will have only worsened it as it has less ti...
@boycey in milder temps you have to limit heating with the thermostats so that’s set at 22C to turn the heat pump off till it cools back down again.
SPONSORS
Degrees of Separation
Latest Posts
-
RE: PV and battery long payback - sense check query
@davidb, it would be helpful if we had some ballpark id...
By Majordennisbloodnok , 5 hours ago
-
RE: Can I start an argument about buffer tanks please? 🙂
Assume flow from the heat source is higher than flow to...
By bobflux , 6 hours ago
-
RE: Indevolt Batteries UK Support & Info Thread
Thanks for that. BTW I'd be happy to test one for you...
By BlizzardGreen , 9 hours ago
-
RE: Air source heat pump roll call – what heat pump brand and model do you have?
Forum Handle: adrian Manufacturer: Appliandirect.co....
By Adrian , 9 hours ago
-
RE: Acond heat pump failed after four years - diagnostic quote £940 plus VAT
@downfield Thank you Downfield. This sounds potenti...
By Mia , 21 hours ago
-
RE: Digest of UK Energy Statistics
@jeff Yes my brother in Oz told me of that charge year...
By Jancold , 22 hours ago
-
RE: Love veg, hate watering cans
My dear daughter came for a bath and was given clear (I...
By Jancold , 22 hours ago
-
RE: Questions about A2A for heating as well as cooling
@ashp-bobba ah that's good to know, I'll get in contact...
By donciccio , 1 day ago
-
RE: Aircon - in listed buildings
@etchedpixels thanks for giving such a full and helpful...
By GrahamF , 2 days ago
-
RE: Who's your electricity provider and what's your tariff?
@old_scientist The service engineer powered down the ex...
By Papahuhu , 2 days ago
-
RE: Issue with Samsung Cascade System
@jamespa It's a funny system, but was out only option l...
By Renewables345 , 2 days ago
-
RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
Thanks, I like the chart, very helpful and this will de...
By baroquebank , 3 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
Production resumed to normal once the issue ...
By MK4 , 3 days ago
SPONSORS
