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Hi all, The battery terminals on my Siemens Landis & Staefa REV11 have finally given up the ghost. Over the last year they started to corrode and I've used white vinegar and a cue tip to clean it up a few times which has extended it's life for a while, but now it's time to get a replacement. I...

Hi All, I’ve had a Siemens CMV 322 3 port 22mm valve on my heating system for around 4 years, but the valve has ceased. The actuator itself appears to work ok but I can only get the boiler to switch on for hot water and not the central heating. I’ve tried to search for just the 3 way port but...