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my diverter valve isn,t working?

i have a ravenheat csi85t boiler,i have just changed the o rings in the diverter valve but when hot water is in use my rads are getting warm
andy, October 2010
Likely that the diverter valve has stopped working, a common problem. Either change it or get a plumber to look at it.

AcmeUK, October 2010
link Click here to see other fixes for Ravenheat.