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!
Ecodan Wireless Controller changing the room temperature target itself
Has anyone with the Ecodan Wireless controller experienced it changing the target room temperature itself. Mine has happily sat at 18.5 degrees for all of the last 12 months. However twice in the last week it has automatically changed itself to 29.5 degrees. This has caused complete chaos with the flow temps and cycling!
Any ideas? I am wondering whether the batteries might be going.
Mine has not missed a beat since installation in 2019 and is still using the original set of batteries. Have you set any form of schedule in Melcloud?
Strange! Indeed perhaps a schedule on the physical controller or MELCloud?
Or could it be that the heat pump is by itself switching to fixed flow temp mode and displaying the flow temperature.
CEO and co-founder at HavenWise
This definitely sounds like a scheduling issue. Our iBoost from a few years ago had a random immersion boost twice a week when it was fitted, which spiked our electricity use unnecessarily, and we have no idea why it was set like that. We found and removed it.
I’d suggest you have a look at the schedule and see if there’s a random boost or off-peak setting activated. These can sometimes get overlooked.
🔥 Britain’s Heat Pump Shitshow
How Installing a Heating System Became a National Nervous Breakdown
Free UK shipping.
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
New to heat pumps?
Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Posted by: @hjdHas anyone with the Ecodan Wireless controller experienced it changing the target room temperature itself. Mine has happily sat at 18.5 degrees for all of the last 12 months. However twice in the last week it has automatically changed itself to 29.5 degrees. This has caused complete chaos with the flow temps and cycling!
Any ideas? I am wondering whether the batteries might be going.
had the same issue.
Strange as it may sound I changed the batteries in the wireless controller.
Bobs your uncle
Thanks all for your suggestions and input. I'm pretty certain no schedule has been set so I am going to try changing the batteries as @westkent suggested as will report back if it solves the problem.
- 27 Forums
- 2,758 Topics
- 64.9 K Posts
- 1,499 Online
- 7,162 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
RE: Where heat loss surveys seem to go against practical reality
I am amazed that there is not something out there to me...
By JamesPa , 2 hours ago
-
RE: Next steps on my ASHP journey: Radiators and Pipework
@bobflux The hydraulic simulator is very interesting...
By Rob of York , 8 hours ago
-
RE: 7kW EV Charger Options Advice
Thanks. Yes, we have patchy 4G. The only option we had ...
By Rusty , 13 hours ago
-
-
RE: Being screwed over by Volkswagen Audi Group
Thanks, @batpred. That integration is the one I have in...
By Majordennisbloodnok , 1 day ago
-
RE: How Accurate Is My DIY Heat Loss Calculation?
@batpred I suspect it will be more this year. I had 9 ...
By AndrewJ , 1 day ago
-
RE: Surface mount or bury primaries for heat pump installation?
@jamespa It's rusting 🙂
By tomasmcguinness , 1 day ago
-
RE: Glass lined Cylinder for private water supply
Thank you, once again, for your replies. Yes...
By ian33a , 1 day ago
-
It’s been out a few days and Amazon has already attache...
By Mars , 1 day ago
-
RE: Missing flow temperature in Heat Geek proposal
Yes, and this is another point I agree. We did find a f...
By Batpred , 2 days ago
-
RE: Problems with sizing a replacement for a Viessmann Vitocal 200-S
A very good point. In effect, the DHW pipework is an em...
By cathodeRay , 2 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@tim441 Here are those same three month periods for 202...
By Toodles , 4 days ago
-
RE: Adding additional Solar Panels to a DC coupled battery system
@transparent thank you for your reply above. As alway...
By Old_Scientist , 5 days ago
-
RE: Adventures in heat loss calculations
@rob-of-york — thanks for posting this, all very useful...
By cathodeRay , 6 days ago



