Heat pumps · Error codes · Ideal Heating
65Ideal Heating · Logic Air
65 on an Ideal Heating Logic Air: Room Stat 2 Fault
Short answer
On an Ideal Heating heat pump, 65 means: Room Stat 2 Fault. The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Room Stat 2 Fault.
Part involved: room thermostat zone 2.
Likely causes:
- Flat batteries in zone 2 room thermostat; weak signal; faulty thermostat/smart interface.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
What you can check
- Note the code or fault message shown on the controller/Halo and when it appeared; check the heat pump's isolator and consumer-unit breaker are on. Replace the Halo thermostat batteries (4x AA) as shown in the Halo user guide and check the Halo shows it is communicating.
What the engineer will check
- Relocate thermostat; replace room thermostat and smart interface.
Who to ask for: Heating controls engineer.
Sources
- Logic Air Monobloc Heat Pump System - Installation & Maintenance (UIN 241428 A03) ↗ · UIN 241428 A03 · page 78 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026