Heat pumps · Error codes · Ideal Heating
370-F23Ideal Heating · Logic Air
370-F23 on an Ideal Heating Logic Air: Heat Pump fault: Hydraulic HX temperature
Short answer
On an Ideal Heating heat pump, 370-F23 means: Heat Pump fault: Hydraulic HX temperature. 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: Hydraulic HX temperature.
Likely causes:
- Outdoor-unit fault; I&M directs engineer to Logic Air Maintenance Manual 'Troubleshooting 15'. 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. Read the heating system pressure gauge (compare it with the pressure your installer set) and report it; check the filling loop is closed.
What the engineer will check
- Follow Logic Air Maintenance Manual Troubleshooting 15 (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