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Mars
Mars
@editor
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Illustrious Member
Joined: Feb 11, 2021
Last seen: Jun 24, 2025
Topics: 296 / Replies: 3000
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RE: Does legionella cycle also heats up radiators?

@bbmorales it's a personal preference and depends on the likelihood of bacteria proliferating in your tank. We run a Legionella cycle every two weeks....

1 year ago
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RE: Ecodan - Legionella Operation Time and Target Temperature

@richard24738 I think the issue with your system, which requires investigation, is why it's taking so long and not ultimately getting to 60C. Like @ab...

1 year ago
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RE: Ecodan - Legionella Operation Time

It appears that your current Legionella cycle is quite lengthy. Typically, achieving and maintaining a water temperature of at least 60°C for about 30...

1 year ago
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RE: Error on Immersun – Error 8 Load Short Circuit

@mikeavison that's a great fix. Well done, and £160 - transistors saved. I don't suppose you took photos of the transistors you replaced as an addit...

1 year ago
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RE: New radiators installed and system drained - what to do next?

@scrchngwsl, while it's tempting to fill the system and get it running during this cool spell, I would advise against it. Since the UFH (underfloor he...

1 year ago
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RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

A light-hearted, funny video that highlights the divide that exists in the world of heat pump installations as two titans clash over the industry's mo...

1 year ago
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RE: Ecodan U4 error code

@spacebiscuit, ouch. I can understand why there may be some diagnostics required based on the error. I'll reach out to my installer network to see if ...

1 year ago
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RE: Ecodan U4 error code

@spacebiscuit I'd definitely recommend calling Mitsubishi so they can walk you through it. If anything, it'll point you in the right direction. This i...

1 year ago
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RE: Ecodan U4 error code

@spacebiscuit I've heard back from Mitsubishi. They've informed me that for error codes they have a platform on their website that initially identif...

1 year ago
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RE: Ecodan U4 error code

Welcome to the forums @spacebiscuit. I’ll reach out to Mitsubishi for advice. As an aside, have you reached out to your original installer?

1 year ago
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