Heat pumps · Error codes · Dimplex
S16Dimplex · WPM heat pump manager platform (error-code grouping)
S16 on a Dimplex WPM heat pump manager platform: Soft starter: heat pump switch-off due to soft starter
Short answer
On a Dimplex heat pump, S16 means: Soft starter: heat pump switch-off due to soft starter. The heat pump keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Soft starter: heat pump switch-off due to soft starter.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Resetting itself: Automatic; if still shown after 30 min power off at mains for >=10 min (GDHV).
What you can check
- If still shown after 30 minutes, switch the heat pump off at its isolator for at least 10 minutes and back on; if it returns call an engineer (GDHV).
What the engineer will check
- Investigate cause if block recurs frequently.
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