Quote Originally Posted by black olive View Post
thread on resetting, assuming its got a black olive valve fitted,

https://www.two-sixties.co.uk/mgoc26...valve-actuator

even if its had a new original style valve fitted the seals harden and leak even though the valve looks perfectly serviceable, and it only takes a sniff of hot water to make the cabin unbearably hot
Although I have a B-O valve, as most of us do, is that resistance value a good way of checking that an original MGR valve is at least (attempting to) close off correctly, or is that in some way different?

David