BoilerTool
Home
/
Greenstar Heatslave II
/
A7
A7
DHW sensor defect
Worcester Bosch Greenstar Heatslave II
Cause 808 (Blocking)
DHW sensor defective. Check and replace defect sensor as necessary
Action
Reset
This code also applies to:
Greenstar Heatslave II External
Source:
Manufacturer manual (PDF)
hello@boilertool.co.uk
© 2026 BoilerTool