Heat pumps · Error codes · Intergas
n011Intergas · Xtend hybrid heat pump
n011 on an Intergas Xtend hybrid heat pump: Communication with the outdoor unit has been lost or the outdoor unit has an internal fault
Short answer
On an Intergas heat pump, n011 means: Communication with the outdoor unit has been lost or the outdoor unit has an internal fault. The heat pump keeps running. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Communication with the outdoor unit has been lost or the outdoor unit has an internal fault.
Part involved: controller / PCB communication.
Likely causes:
- Check WiFi control screen; check indoor-outdoor wiring; check outdoor unit connections.
Is it safe?
| Does the heat pump stop? | No |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The heat pump keeps running.
Resetting itself: unknown.
What you can check
- Note the code shown on the controller and the model number on the unit's rating label before contacting your installer.
- Check that the heat pump's isolator and consumer-unit breaker are on; do not open any casing.
What the engineer will check
- Check communication cables and connectors between boards/controller.
- Check board power supplies.
- Check addressing and firmware compatibility.
- Replace the faulty board.
Who to ask for: Heat pump engineer.
Certification: Heat pump installer competence; F-gas and flammable-refrigerant (R32/R290) handling competence for any refrigerant-circuit work.
What you might notice
Sources
- Intergas Xtend Monoblock Heating Solutions Installation Instructions V1.2 (88302401w) ↗ · V1.2 · page p.73 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026