Solar · Error codes · myenergi
4-2myenergi · eddi solar immersion diverter
4-2 on a myenergi eddi solar immersion diverter: Overheat - internal temperature too high
Short answer
On a myenergi inverter, 4-2 means: Overheat - internal temperature too high. The inverter keeps running with some functions stopped.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: Overheat - internal temperature too high.
Likely causes:
- Restricted airflow, clearance, high ambient.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
The inverter keeps running with some functions stopped.
Resetting itself: after cooling.
Manual reset: Reboot device from menu or via supply breaker.
What you can check
- Read the fault on the eddi screen. Check the eddi supply breaker is ON. Make sure nothing is covering the eddi's ventilation slots and the airing cupboard is not stacked against it.
What the engineer will check
- Check clearances/ventilation; remove dust.
Who to ask for: Electrician / plumber-electrician for immersion circuits.
Certification: Competent electrician (BS 7671); immersion heater work to Part P.
What you might notice
Sources
- myenergi Help Centre - eddi Installers > Fault Codes ((4)1 to (4)8) ↗ · Help Centre article · page 30222353941649 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026