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Heat pumps · Error codes

Octopus Energy heat pump error codes

Octopus Energy (Cosy) · An established brand in the UK. 6 codes across 1 product family, each taken from the manufacturer’s manuals. Octopus Energy technical support ↗

Find a Octopus Energy engineer →6 codes · reviewed 23 September 2026

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Type the code on your display or a word from its meaning. Each code opens its own page with what it means, whether it is safe and what you can check.

6 codes

CodeMeaningStops?Homeowner check?
HUB-FLASHING-RED
Cosy Heat Pump has a fault
Not statedYes
HUB-SOLID-RED
No primary Cosy Pod found in one of your heating zones (primary Cosy Pod disconnected)
PartlyYes
HUB-SOLID-YELLOW
Lost Wi-Fi connection
NoYes
POD-FLASHING-RED
Low battery
NoYes
POD-OTHER-COLOUR
Any other colour - please get in touch
Not statedYes
POD-SOLID-RED
Cosy Pod lost connection to Cosy Hub
NoYes