F24 on a Dimplex WPM heat pump manager platform: Coding: coding does not correspond to the heat pump type
Short answer
On a Dimplex heat pump, F24 means: Coding: coding does not correspond to the heat pump type. 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: Coding: coding does not correspond to the heat pump type.
Part involved: WPM coding resistor/number.
Likely causes:
- Wrong coding number for the heat pump type (e.g. after controller replacement or software upgrade).
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: After rectifying the fault the heat pump can be restarted; switching off the control voltage also acknowledges the fault (WPM Touch p.54). On text-display WPMs press Esc to acknowledge (EconPlus EN-16).
Manual reset: Acknowledge after rectification.
What you can check
- Note the fault code, the heat pump model (type plate) and controller software version shown in operating data, and contact the installer/Dimplex service.
What the engineer will check
- Read off detected heat pump type in Version overview menu.
- Compare with coding number on type plate / GDHV coding table.
Who to ask for: heat pump service engineer.
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 55 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026