ERR-CURRENT on a Stiebel Eltron WPM 3 heat pump manager: Value of the current sensor outside the permissible range
Short answer
On a Stiebel Eltron heat pump, ERR-CURRENT means: Value of the current sensor outside the permissible range. 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: Value of the current sensor outside the permissible range.
Part involved: temperature/pressure sensor.
When it shows: Value of the current sensor outside the permissible range.
Likely causes:
- Check leads and the relevant plug-in connectors, and replace if faulty.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: yes - restarts after IWS fault time/idle time.
Manual reset: after 5 faults in 2 h run: IWS reset.
What you can check
- Read and note the full message code and time from the WPM display (DIAGNOSIS / NOTIFICATIONLIST if accessible without a code).
- Check the heat pump and controller circuit breakers/isolators at the consumer unit are on.
What the engineer will check
- Check leads and the relevant plug-in connectors, and replace if faulty.
Who to ask for: Heat pump service engineer (electrical/controls).
Certification: Qualified electrician competence for live-work on appliance electrics.
What you might notice
Sources
- OPERATION AND INSTALLATION Heat pump manager WPM 3 (DM0000035521) ↗ · A 316199-43934-9674 · page 51 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026