Heat pumps · Error codes · Ideal Heating
370-F20Ideal Heating · Logic Air
370-F20 on an Ideal Heating Logic Air: Heat Pump fault: Outdoor low pressure
Short answer
On an Ideal Heating heat pump, 370-F20 means: Heat Pump fault: Outdoor low pressure. 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 Pump fault: Outdoor low pressure.
Likely causes:
- Outdoor-unit fault; I&M directs engineer to Logic Air Maintenance Manual 'Troubleshooting 22'. See corresponding Maintenance Manual LED-code records for detailed causes.
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
- Follow Logic Air Maintenance Manual Troubleshooting 22 (control box interface PCB LED sequence also identifies fault).
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-circuit work; electrical work by competent person.
Sources
- Logic Air Monobloc Heat Pump System - Installation & Maintenance (UIN 241428 A03) ↗ · UIN 241428 A03 · page 75 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026