# Samsung 8kw EHS Mono HT Quiet - clarification on cycling and the impact of undersized radiators **URL:** \ **Category:** Heatpump\ **Tags:** samsung\ **Created:** [24 November 2025 12:42 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446 "2025-11-24T12:42:27Z")\ **Posts on this page:** 6\ **Page:** 2
**Author:** ![Kate](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kate](https://community.openenergymonitor.org/u/Kate)\ **Post date:** [5 December 2025 17:40 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/21 "2025-12-05T17:40:33Z")
Hi Stuart, Thanks for dropping in and adding to this. I’d been reading some of your posts on other threads and thought you had a similar setup. Again that’s all really helpful info and good to have a comparison to someone. I hadn’t noticed the defrost cycles yet so useful to know before I stand there timing again wondering what’s going on. I’ve got my temperatures at 31 and 41 now with a 4 degree hysteresis, so will wait for some variations in weather temperatures to see how that works both in terms of cycling and keeping the house warm. ---
**Author:** ![Kate](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kate](https://community.openenergymonitor.org/u/Kate)\ **Post date:** [6 January 2026 15:11 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/22 "2026-01-06T15:11:00Z")
> [@Kate](#): > > Current settings are > > - 201: 15 to -2 > - 202 and 203: 32 to 42. I think 202 and 203 were originally 35-50 but I’ve revised down. > - 2041: WL-1-Floor > - 2091: Use (Signal On?OFF) or WL Interlink OFF(Water Pump3) > - 2092: Not Use > - 2093: Room Temp. ON/OFF or WL Interlink ON/OFF(Water Pump2) > - 4013: 13 degrees > - 4041: Not use > - 4042: 10 degrees > - 4052: Use(Max 100%) Hi all, hope you’re still feeling toasty warm in this cold snap we’re having. It’s been a good test of my settings though so thought I’d share. Overall it has been working really well. Cycling is about the same so no problems there. I did bump up the higher flow temp (the one for the lower outdoor temp) to 42 and then 43 from 41 as it was just a little too chilly upstairs where we’ve not got the best sized rads. But honestly the power consumption/cost is fine for us. Just before it got really cold I actually put the lower flow temp figure (or one for the higher outdoor temp) down to 28 and that was fine. Will see when we get closer to the 14 degrees mild temperatures. 4 degree hysteresis seems to be working fine too. The house temperature doesn’t really drop before the compressor kicks back in. So thank you for all your help. Here are some shots of our heat pump energy consumption over the last week or so ![image](https://community.openenergymonitor.org/uploads/default/original/3X/1/8/188dd56a777c5beecd9d594ff21b35d110685d40.jpeg) ![image](https://community.openenergymonitor.org/uploads/default/original/3X/5/6/56cff44a12908538086f9e6fb44ac971a1cf9e31.jpeg) And then overall consumption and cost, just in case it’s of interest. ![image](https://community.openenergymonitor.org/uploads/default/original/3X/e/8/e8b4f82506bc3db7defb9991899621d67bbc58ef.png) ![image](https://community.openenergymonitor.org/uploads/default/original/3X/d/0/d09a2201ca6495bb2ce19e54968f174f8cffbbb2.png) ---
**Author:** ![jakeymd1](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/j/db5fbb/32.png) [@jakeymd1](https://community.openenergymonitor.org/u/jakeymd1)\ **Post date:** [7 January 2026 13:21 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/23 "2026-01-07T13:21:11Z")
Hi Kate, glad you’ve managed to get it dialled in nicely. Samsung controls could certainly be improved to make all of this easier. ---
**Author:** ![Kate](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kate](https://community.openenergymonitor.org/u/Kate)\ **Post date:** [6 February 2026 20:30 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/24 "2026-02-06T20:30:22Z")
Resurrecting this thread as I wanted to sense check something with you all. On a Facebook group I’m in for Samsung Heat pump owners people keep saying you need 2091 and 2092 set to “Do Not Use” for water law to be working. But I’m 99% sure mine is running on Water Law with 2091 being used. They are also saying that if the home screen says Heat on the left and Water Law on the right then it isn’t running Water Law and it only doing so if it says Auto on the left and Water Law on the right. Am I going mad? Are they right and I’ve misunderstood this whole thing? ---
**Author:** ![MikeJH](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/m/41988e/32.png) [@MikeJH](https://community.openenergymonitor.org/u/MikeJH)\ **Post date:** [6 February 2026 23:25 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/25 "2026-02-06T23:25:17Z")
That’s all nonsense. 2091/2 Do not use means that the wired remote controller’s thermostat will be used to limit the heat pump as opposed to an external 3rd party thermostat. As long as the Standard Temperature setting is Indoor and not Water Outlet, then Water Law ( weather compensation) will be operating irrespective of whether an external thermostat or the controller’s thermostat is being used. I’ve never used Auto and always had Water Law operating. ---
**Author:** ![Kate](https://community.openenergymonitor.org/letter_avatar_proxy/v4/letter/k/f04885/32.png) [@Kate](https://community.openenergymonitor.org/u/Kate)\ **Post date:** [7 February 2026 21:34 UTC](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446/26 "2026-02-07T21:34:03Z")
Thanks Mike! I thought I was right. Good to have it confirmed. [Previous page](https://community.openenergymonitor.org/t/samsung-8kw-ehs-mono-ht-quiet-clarification-on-cycling-and-the-impact-of-undersized-radiators/29446.md?page=1)