Heat pumps · Error codes · Dimplex
NO-LINKDimplex · WPM heat pump manager platform (error-code grouping)
NO-LINK on a Dimplex WPM heat pump manager platform: 'No Link' on display: link between display screen and heat pump controller not established
Short answer
On a Dimplex heat pump, NO-LINK means: 'No Link' on display: link between display screen and heat pump controller not established. 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: 'No Link' on display: link between display screen and heat pump controller not established.
Part involved: Display / link cable / main controller.
When it shows: Persists more than a couple of minutes after power-up.
Likely causes:
- Link cable between screen and controller.
- Faulty display.
- Faulty main controller.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
- Switch the heat pump off and on again at its isolator; 'No Link' normally clears within about a minute.
- Master-controlled multi-heat-pump systems: do not do this - call Dimplex technical support.
What the engineer will check
- Check link cable.
- Replace display or controller as diagnosed.
Who to ask for: heat pump controls.
What you might notice
Sources
- GDHV Help Centre article: i have no link showing on my new heat pump display what does this mean ↗ · GDHV article modified 2024-07-16 · page n/a (web article) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026