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HarrisonC
@harrisonc
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Active Member
Joined: Dec 16, 2025
Last seen: Mar 29, 2026
Profile Activity
Topics: 0 / Replies: 17
AllTopicsReplies
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

Went down to 0 degrees last night. Still oscillates a bit but not as bad as before.  

2 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@swwils are you on Cosy 9, as the Cosy 6 definitely doesn't when it modulates down. Does your Cosy heat output under or over-report?ah should have kno...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@swwils Next thing they need to fix is correctly measuring power. What card are you using for Home Assistant for these out of interest?

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@kevh I have to go into the installer mode and check the version number. The new behavior seems to kick in after 5 degrees. You can see below where th...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@agentgeorge I am on Firmware Version 5.4.2 and have seen a change in how the heat pump operates below 5 degrees over the last few days. Runs a lot mo...

3 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@kevh with the Cosy 6 I know it definitely goes to around 30-31 degC, so not surprised if the Cosy 9 is 35 degC.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@andrewj Seeing they deleted both threads with the pictures on the group... maybe wasn't meant to be public yet.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@andrewj Yeh, I am not sure. I assume though it is to allow the heat pump to boost over the normal set temperature in the off-peak periods and then ri...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@andrewj It's in the comments on the PCB post from yesterday. Here is the screenshot. The user is on the Cosy tariff as well, so it might be that it p...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@andrewj So "octopusenergy" is the password for one of the pages, but there is a separate Manufacturer password for two other pages. I did manage to g...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

@andrewj Forgot that bit as I haven't had to do it in a while. Trying to figure out the Manufacturer password (or a bypass), as Engineer password is r...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Octopus Cosy Heat Pump Owners & Discussion Thread

Also here is the manual -

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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