HUB-SOLID-RED on an Octopus Energy Cosy: No primary Cosy Pod found in one of your heating zones (primary Cosy Pod disconnected)
Short answer
On an Octopus Energy heat pump, HUB-SOLID-RED means: No primary Cosy Pod found in one of your heating zones (primary Cosy Pod disconnected). The heat pump keeps running with some functions stopped.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: No primary Cosy Pod found in one of your heating zones (primary Cosy Pod disconnected).
Part involved: Cosy Pod (primary room sensor) / Zigbee link.
Likely causes:
- Primary Pod battery flat; Pod out of range of Hub; Pod removed/faulty.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Warning |
The heat pump keeps running with some functions stopped.
Resetting itself: yes (clears when a primary pod reconnects).
Manual reset: no.
What you can check
- In the Octopus app, identify which Primary Pod is offline; check/replace its 2x AAA alkaline batteries (not rechargeable); move the Pod within ~5 m of the Hub; or nominate another online Pod in that zone as Primary.
What the engineer will check
- Re-pair Pod / reassign zones via installer website; check Hub Zigbee radio.
Who to ask for: Manufacturer-employed engineer (Octopus Energy Services) - R290/ heat pump.
Certification: Octopus-authorised engineer; F-gas/ R290 flammable refrigerant competence for refrigerant work.
What you might notice
Sources
- Get to know your Cosy heat pump (user guide) v20.2 ↗ · 20.2 (file: Get_to_know_your_Cosy-20.2-internal.pdf) · page PDF p.16 (printed 15); troubleshooting PDF p.24 (printed 23) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026