Search with Wattson

Notifications

Clear all

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!

Hitachi Yutaki SCombi Heat Pump - Owners

Page 1 / 3 Next

Air Source Heat Pumps (ASHPs)

Last Post by JamesPa 9 months ago

27 Posts

4 Users

2 Reactions

4,226 Views

RSS

trebor12345

(@trebor12345)

Reputable Member Member

Joined: 3 years ago

Posts: 197

Topic starter 05/04/2025 2:09 pm [#2248]

Does anyone on this forum own a Hitachi Yutaki SCombi Heat Pump? I need to find others and their experience of the system.

I would also be looking for a user specific forum for this pump, I drew a blank. Anyone know of one?

2024 build bungalow, Southern England, 179 m2, 14w/m2
Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Tesla 13.5kw Powerwall

Quote

Topic Tags

hitachi Yutaki

Mars

(@editor)

Illustrious Member Admin

Joined: 6 years ago

Posts: 4835

05/04/2025 2:47 pm

@nick and @muscatblue have these units. Not sure if they're still active on these forums (they were last here in 2021), but because they've been tagged they should receive a message, so let's see if they return to help you.

@trebor12345, what was your question?

🔥 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.

ReplyQuote

trebor12345

(@trebor12345)

Reputable Member Member

Joined: 3 years ago

Posts: 197

Topic starter 05/04/2025 6:37 pm

@editor I just wanted to know other owners thoughts and experience of this system. I am having issues with short cycles and getting steady flow temperature.

2024 build bungalow, Southern England, 179 m2, 14w/m2
Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Tesla 13.5kw Powerwall

ReplyQuote

Sim0n0

(@sim0n0)

Active Member Member

Joined: 9 months ago

Posts: 26

26/11/2025 1:50 pm

Posted by: @trebor12345

↑

Does anyone on this forum own a Hitachi Yutaki SCombi Heat Pump? I need to find others and their experience of the system.

I would also be looking for a user specific forum for this pump, I drew a blank. Anyone know of one?

I've got a Hitachi Yutaki 11kW split system. Nothing but trouble and expense over the last 2 1/2 years. Hitachi customer support doesn't exist in the UK. Bosch has recently acquired Hitachi/Johnson Controls for all of Europe, so let's see what happens...

👍

ReplyQuote

Mars

(@editor)

Illustrious Member Admin

Joined: 6 years ago

Posts: 4835

26/11/2025 5:10 pm

@sim0n0, increasingly strong anti-Hitachi messaging. Just goes to show how important manufacturer support is. Thanks for sharing.

ReplyQuote

trebor12345

(@trebor12345)

Reputable Member Member

Joined: 3 years ago

Posts: 197

Topic starter 26/11/2025 5:22 pm

Posted by: @sim0n0

↑

Posted by: @trebor12345

↑

Does anyone on this forum own a Hitachi Yutaki SCombi Heat Pump? I need to find others and their experience of the system.

I would also be looking for a user specific forum for this pump, I drew a blank. Anyone know of one?

I've got a Hitachi Yutaki 11kW split system. Nothing but trouble and expense over the last 2 1/2 years. Hitachi customer support doesn't exist in the UK. Bosch has recently acquired Hitachi/Johnson Controls for all of Europe, so let's see what happens...

Sim0n0. I also have the Hitachi Yutaki system. Also having lots of problems.

2024 build bungalow, Southern England, 179 m2, 14w/m2
Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Tesla 13.5kw Powerwall

ReplyQuote

JamesPa

(@jamespa)

Illustrious Member Moderator

Joined: 3 years ago

Posts: 5320

26/11/2025 5:27 pm

@sim0n0

Sorry to hear that. Putting the past aside would you like to describe the current problems and tell us a bit about your system and house in case we can offer support.

4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.

ReplyQuote

trebor12345

(@trebor12345)

Reputable Member Member

Joined: 3 years ago

Posts: 197

Topic starter 27/11/2025 5:58 pm

@sim0n0

It would be very useful if you could tell us more about your experience.

2024 build bungalow, Southern England, 179 m2, 14w/m2
Underfloor heating, fully open
Vaillant aroTHERM plus 3.5kW
50 litre volumiser
3.6KW solar panels
Tesla 13.5kw Powerwall

👍

ReplyQuote

Sim0n0

(@sim0n0)

Active Member Member

Joined: 9 months ago

Posts: 26

29/11/2025 1:13 pm

@jamespa Hi James I appreciate the offer, but what I need is a local heat pump engineer familiar with Hitachi that can offer servicing/support. They don't exist and Hitachi doesn't have UK support. The original installers were useless (now Heat Geak certified), MCS certificate isn't worth the paper it's written on, and Hitachi/Hitachi engineers are non-existent in the UK.

ReplyQuote

Sim0n0

(@sim0n0)

Active Member Member

Joined: 9 months ago

Posts: 26

29/11/2025 1:16 pm

@trebor12345 Sorry, the forum won't let me message you until I have more replies

ReplyQuote

Sim0n0

(@sim0n0)

Active Member Member

Joined: 9 months ago

Posts: 26

29/11/2025 1:23 pm

@editor So many pro heat pump evangelists on the internet, but the reality, at least local to me in Buckinghamshire, is an industry full of charlatans.

ReplyQuote

Sim0n0

(@sim0n0)

Active Member Member

Joined: 9 months ago

Posts: 26

29/11/2025 1:30 pm

@jamespa Latest issue is the system getting 'stuck' in hot water mode and not switching back to heating. The motorised valve can be operated manually.

ReplyQuote