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Thanks for the confirmation. Another q..... I see the 3 port valve as being three components: Head (grey plastic box housing motor, with rachet cog visible) Body (having manual override lever, microswitches, two or three springs) Pipe work (T shape pipe junction containing valve...

Hello, Lot's of great, informative posts on here have inspired me to attempt to resolve a 3 port valve issue: Siemens MA-V322C, 3 port valve, approx 9 yrs old. Worked well for years, then buzzing noise started for a few months and eventually had to use the manual override lever on...

Did you really buy a house for under 40K - or is that a typo?