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!
Samsung Heat Pump Issues
Hi everyone!
Our home has a Samsung air source heat pump setup and to be honest I’ve always thought it’s been pretty good! A lot of our neighbours have had issues and swapped out their systems for oil boilers (a bit of a step backwards to me) the only issue we have ever had was with the unit freezing up but I managed to get someone to come out and replace the sensor that made the auto defrost work and that sorted it.
But we are now being plagued with a low flow error (E911) everything online says it should be an easy fix but I can’t get to the back of it, I’ve cleaned the magnetic filter we have on the system and topped up the pressure to just under 2 bar but still the same. Looking online our system looks like it’s been plumbed in very differently to a lot of others, I’ve attached a photo if anyone has any suggestions or ideas or things they think look a little weird then let me know! 😂
Scott
Welcome to the forums @scotty229. I would suggest seeing if there's a Y-strainer on your system too, which has a gauze filter in it that often triggers flow errors if there any corrosive bits in it.
New to heat pumps? Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
@scotty229 I'm sorry to hear of your issues. It looks as if you have an old fashioned flow meter on the right vertical pipe as well as possibly a Sika flow meter on the upper horizontal pipe. If so, do they both show low flow rates? The heat pump will throw a E911 error if the Sika flow meter reports a low flow rate even if this is falsely low. Is your Wilo pump on its maximum setting? Is your system a single loop (I cannot see a buffer tank) and how is your hot water heated?
There are others on this forum, who understand how the piping should be arranged much better than me. Hopefully, someone will comment on this.
- 27 Forums
- 2,746 Topics
- 64.5 K Posts
- 368 Online
- 7,149 Members
Join Us!
Installer Finder
Degrees of Separation
Latest Posts
-
Have you considered keeping your FF boiler and suppleme...
By Old_Scientist , 53 minutes ago
-
RE: Who's your electricity provider and what's your tariff?
@toodles I invested on Miele a pair of frodge frozor wh...
By AgentGeorge , 2 hours ago
-
RE: Flushing system, cleaning and inhibitor
Flush and fill all complete. Octopus kindly gave us a...
By Old_Scientist , 3 hours ago
-
RE: Wood burner with ASHP - direct air?
For what it's worth I installed a wood burner in this o...
By BlizzardGreen , 4 hours ago
-
@editor Thanks for your response and recommendations. ...
By DavidB , 11 hours ago
-
RE: Do I add Air Con or MVHR to existing A2W ASHP?
I think I saw a diagram for an exhaust air dhw tank wit...
By JamesPa , 1 day ago
-
RE: Indevolt Batteries UK Support & Info Thread
Thanks, however that's an answer to a subtly different ...
By JamesPa , 3 days ago
-
RE: Solar Power Output – Let’s Compare Generation Figures
@toodles Such elegant symmetry. look at my lumpy bag of...
By Papahuhu , 4 days ago
-
RE: PV and battery long payback - sense check query
Quite probably not, but you can get a 32A relay and a S...
By JamesPa , 4 days ago
-
RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
@ian-s Look forward to making contact soon! Regards, To...
By Toodles , 4 days ago
-
I don't notice mine defrosting, and most of the time Im...
By JamesPa , 5 days ago
-
RE: Do I need to change the control unit when replacing my Ecodan Air Source Heat Pump
Kind of you, @calumm, but it was @f1p who did the heavy...
By Majordennisbloodnok , 6 days ago





