Screed-drying-set-point-value-for-heating-not-reached on a Worcester Bosch heat pump: Alarm: Screed drying set point value for heating not reached
Short answer
On a Worcester Bosch heat pump, Screed-drying-set-point-value-for-heating-not-reached means: Alarm: Screed drying set point value for heating not reached. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 2 sources
What it means
On the Greensource Split HP Hydrolight / Hydrocomfort
The manual says: Alarm: Screed drying set point value for heating not reached.
Part involved: screed drying program.
When it shows: Stage temperature not reached within set time.
Likely causes:
- Stage temperature not reached within set time.
On the Greenstore LECP ground source heat pump (System & Combi)
The manual says: Screed drying set point value for heating not reached.
Part involved: screed drying program.
When it shows: Set point for drying step not reached.
Likely causes:
- Set point for drying step not reached.
Is it safe?
On the Greensource Split HP Hydrolight / Hydrocomfort
| 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: no.
Manual reset: Acknowledge by pressing the rotary selector (Acknowledge) on the Hydrolight/Hydrocomfort user interface.
On the Greenstore LECP ground source heat pump (System & Combi)
| Does the heat pump stop? | No |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The heat pump keeps running.
Resetting itself: no.
Manual reset: Program continues.
What you can check
On the Greensource Split HP Hydrolight / Hydrocomfort
- Read and note the full alarm text shown on the controller and pass it to your installer.
- Acknowledge the alarm once on the control panel; if it returns, call the installer.
On the Greenstore LECP ground source heat pump (System & Combi)
- Read and note the full alarm text and category letter shown on the controller and pass it to your installer.
What the engineer will check
On the Greensource Split HP Hydrolight / Hydrocomfort
- Review screed drying settings.
Who to ask for: heat pump installer / heating engineer.
Certification: None specific for hydraulic checks; MCS-certified installer recommended for system changes.
On the Greenstore LECP ground source heat pump (System & Combi)
- Diagnose per chapter 21: Set point for drying step not reached.
Who to ask for: heat pump installer / heating engineer.
Certification: None specific for hydraulic checks; MCS-certified installer recommended for system changes.
What you might notice
Sources
- Installation, Commissioning and Servicing Instructions Greensource Hydrolight and Hydrocomfort (ODU 7.5-12) ↗ · 6 720 806 629 (2013/02) · page 65 · Reviewed 23 September 2026
- Installation, Commissioning and Servicing Instructions Worcester Greenstore LECP GSHP (System/Combi 6-11 kW) ↗ · 6 720 806 768 (2013/02) · page 62 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026