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Thanks very much both of you for the advice, i did try cleaning out the old sensor, but it still registered .4 bar when the system was empty so i think its shot. Having googled some more i suspect i may need the pricey f75 service kit p/n 0020023721, as I have 14 rads on the system. Any...

Hi, In addition the CH isolation valves are very stiif and i cant seemd to fully close them without risk of stripping the slot on the screwhead. Is there are tool other than a screwdriver i should be using? Is it ok to spray them with WD40 to try to loosen them up a bit?

Hi, I've just moved into a house which has a 5year old ecotec pro 28. In preparation for fitting trvs on the rads, i have introduced fernox f3 into the system about 2 weeks ago. Have just come to fit the trvs, and upon refilling the system am getting f75 fault on the boiler. The...