Heat pumps · Error codes · Ecoforest
G040Ecoforest · Ecoforest, all models
G040 on an Ecoforest heat pump: Connection failure between EASYNET GATEWAY and the ECOFOREST device
Short answer
On an Ecoforest heat pump, G040 means: Connection failure between EASYNET GATEWAY and the ECOFOREST device. The heat pump keeps running.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Connection failure between EASYNET GATEWAY and the ECOFOREST device.
Part involved: EASYNET gateway.
When it shows: Gateway cannot communicate with the connected Ecoforest device.
Likely causes:
- Loss of communication between gateway and heat pump.
Is it safe?
| Does the heat pump stop? | No |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The heat pump keeps running.
Resetting itself: unknown.
What you can check
- Check the gateway and heat pump are powered.
- Check your home internet router is working.
What the engineer will check
- Check gateway-to-heat pump communication cable and configuration.
Who to ask for: heat pump installer / controls.
What you might notice
Sources
- Gateway EASYNET User and Installation Manual V01 EN ↗ · V01 · page 6 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026