Heat pumps · Error codes · Alpha Heating Innovation
1040Alpha Heating Innovation · Alpha E-Tec Hybrid (E-Tec EHP 4 kW + E-Tec 33 HB boiler)
1040 on an Alpha Heating Innovation Alpha E-Tec Hybrid: High pressure switch fault: The pressure sensor has activated repeatedly (16 times in 300 minutes)
Short answer
On an Alpha Heating Innovation heat pump, 1040 means: High pressure switch fault: The pressure sensor has activated repeatedly (16 times in 300 minutes). The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: High pressure switch fault: The pressure sensor has activated repeatedly (16 times in 300 minutes).
Part involved: E-Tec EHP outdoor unit.
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
What you can check
- Note the code and any text shown on the display/controller.
- Check the heat pump isolator and consumer-unit breaker are on.
- Check the outdoor unit is not blocked by debris, snow or leaves.
What the engineer will check
- Diagnose outdoor unit fault per manual.
Who to ask for: heat pump engineer.
Certification: F-gas certified engineer (refrigerant circuit).
Sources
- Alpha E-Tec Hybrid - Installation Instructions (package, 06-23) ↗ · E-Tec Hybrid package instructions 06-23 · page 39 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026