Heat pumps · Error codes · Dimplex
S34Dimplex · WPM heat pump manager platform (error-code grouping)
S34 on a Dimplex WPM heat pump manager platform: 2nd heat generator operating mode selected: heat pump switched off, heat provided exclusively by 2nd heat generator
Short answer
On a Dimplex heat pump, S34 means: 2nd heat generator operating mode selected: heat pump switched off, heat provided exclusively by 2nd heat generator. The heat pump keeps running with some functions stopped.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: 2nd heat generator operating mode selected: heat pump switched off, heat provided exclusively by 2nd heat generator.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The heat pump keeps running with some functions stopped.
Resetting itself: User selects another operating mode.
What you can check
- Check operating mode on the controller is not left on '2nd heat generator'.
What the engineer will check
The manual does not list the engineer’s checks for this code.
What you might notice
Sources
- Dimplex WPM Touch heat pump manager - Operating instructions for users and specialists (Order no. 452117.66.02-EN, WPM3.13 / Display 1.15) ↗ · 452117.66.02-EN FD 0302 · page 56 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026