Heat pumps · Error codes · Dimplex
S19Dimplex · WPM heat pump manager platform (error-code grouping)
S19 on a Dimplex WPM heat pump manager platform: High pressure: the heat pump's permissible high pressure values have been exceeded
Short answer
On a Dimplex heat pump, S19 means: High pressure: the heat pump's permissible high pressure values have been exceeded. 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: High pressure: the heat pump's permissible high pressure values have been exceeded.
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 (high pressure safety program).
What you can check
- If frequent, lower heating curve and contact installer.
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