Heat pumps · Error codes · Cool Energy
LACool Energy · EcoStore all-in-one exhaust-air DHW heat pump
LA on a Cool Energy EcoStore all-in-one exhaust-air DHW heat pump: Ambient temperature T4 outside heat pump running range (-7 to 43C) - heat pump stops (units without e-heater only)
Short answer
On a Cool Energy heat pump, LA means: Ambient temperature T4 outside heat pump running range (-7 to 43C) - heat pump stops (units without e-heater only). The heat pump keeps running with some functions stopped.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Ambient temperature T4 outside heat pump running range (-7 to 43C) - heat pump stops (units without e-heater only).
Likely causes:
- Normal condition - no repair necessary.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The heat pump keeps running with some functions stopped.
What you can check
- Read and note the code shown on the controller display, then contact your installer or service engineer.
What the engineer will check
- Check running-hour counters and reset after scheduled maintenance per controller menu.
Who to ask for: heat pump service engineer.
Certification: None specific.
What you might notice
Sources
- Cool Energy EcoStore Heat Pump Water Heater - manual Rev1 ↗ · Rev1 · page 24-26 (printed) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026