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Harriworld
@harriworld
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Joined: Feb 3, 2026
Last seen: Feb 17, 2026
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Topics: 0 / Replies: 13
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@l2jad Must admit my water is lovely and hot. It is switched on for an hour only and gets to temp quickly. Set at 50.

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@l2jad Re the noise of heatpump - mine has been noisier again over last few days. It seems to be the colder outside temperatures. It had been running ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@razz I had my temperatures set at 18 and 21 and heatpump struggled to get to 21 until about 4pm. I set temps back to 19 and 21 and temp during the da...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@editor Thanks so much for this link Mars, have started watching it and will finish! Could have done with researching all these options before buying ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@jamespa I am finding all this chat about buffers and volumisers a bit confusing. Should I be asking TJ why a buffer was installed with my heatpump an...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@l2jad What time is your hot water cycle set for?

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@livinggreen Colder temps definitely set it off. Mine had been less loud but still registered and 70db this morning. And the house is taking all day t...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

How has everyone been finding the latest firmware update? My Cosy 12 is a bit quieter but still above 61dB

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@l2jad You need to lodge a formal complaint and get a reference number. Also write email to Greg@Octopus otherwise your complaint will not be properl...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@livinggreen thanks for that, I'll look into it

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

@l2jad So sorry you are suffering so much and I genuinely empathise as my neighbours are suffering. Is your heatpump running all night? My understandi...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!

I am yet to get the issue of noise from the Cosy 12 heatpump resolved. Had 3 post installlation visits, firmware adjustments and settings altered but ...

3 months ago
Forum
Air Source Heat Pumps (ASHPs)
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