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How do I drop the front cover to adjust the pump flow on a Greenstar CDi?

How do I drop the front cover of a Greenstar CDi to adjust the pump flow
Brian, December 2010
I have dropped the front cover giving access to the control panel, but cannot see any screws at all. All rads are heating o k, but i am getting a rushing noise from some rads, and occassionally hissing.
I thought if I could turn the pump down this may help, but from your answer this appears not to be the case anyway

Brian, December 2010
Casing comes off via 2 screws on the top and 2 on the side (1 either side of the panel which houses the thermostats), but the pump is a fully-modulating type and the boiler's electronics dictate its speed.

What is your aim? Are certain rads not being heated?

CMac, December 2010
link Click here to see other fixes for Worcester Bosch CDi.