LED-10x11 on an Ideal Heating Logic Air: Heat sink temp. error
Short answer
On an Ideal Heating heat pump, LED-10x11 means: Heat sink temp. error. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Heat sink temp. error.
Part involved: inverter heatsink.
When it shows: Protection stop by heatsink temperature 80C, 2 times within 24 h.
Likely causes:
- 1. Foreign matter/dirt on heatsink 2. Foreign matter on heat exchanger, excessive ambient temperature 3. Heatsink thermistor defective.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
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. Check the outdoor unit is not blocked by snow, ice, leaves or stored items and that air can flow freely around it.
What the engineer will check
- Check heatsink and HX for dirt/obstruction and recirculation; check heatsink thermistor (TS 11); replace inverter PCB.
Who to ask for: Heat pump engineer; casing removal only by persons competent with R32 (A2L); refrigerant-circuit work requires Cat I/II F-gas certification (I&M p.75 warning).
Certification: F-gas Cat I/II for refrigerant work; electrical work by competent person.
Sources
- Maintenance Manual LOGIC AIR 8-10 Air/water heat pump Monobloc system (U0753484_2451_EN_1) ↗ · U0753484_2451_EN_1 · page 33 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026