Worcester Bosch Greenstar 30CDI (2010) - same problem (Pump runs constantly after mains power interruption).
First noticed - approx. 6 years? after installation.
Problem - pump runs continuously after power-cut (no weather compensating controller, no room thermostat).
Issue - if a power cut occurs during period when house is empty, the Pump will run continuously until "workaround" is applied.
Attempted fix(s) - "power off" (of varying length up to 12hrs) or "reset" or adding HW/CH will not solve the problem.
WORKAROUND - Create Boiler demand (Ie HW) during or prior to boiler power up sequence (this is the only thing that works for us).
SOLUTION - Worcester Bosch need to publish better/actionable advice to support this known issue for the installed base.
Thank you to this forum and George4321G for adding a clear workaround.
Concern - I was going to arrange the PCB replacement, but reading that this didn't help in earlier post?
First noticed - approx. 6 years? after installation.
Problem - pump runs continuously after power-cut (no weather compensating controller, no room thermostat).
Issue - if a power cut occurs during period when house is empty, the Pump will run continuously until "workaround" is applied.
Attempted fix(s) - "power off" (of varying length up to 12hrs) or "reset" or adding HW/CH will not solve the problem.
WORKAROUND - Create Boiler demand (Ie HW) during or prior to boiler power up sequence (this is the only thing that works for us).
SOLUTION - Worcester Bosch need to publish better/actionable advice to support this known issue for the installed base.
Thank you to this forum and George4321G for adding a clear workaround.
Concern - I was going to arrange the PCB replacement, but reading that this didn't help in earlier post?
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