Thanks for comments.
ive changed the 3 port and that made no difference. Hence the reason I isolated the programmer before testing any voltages.
It idoes seem that it's a programmer fault. I will look for a date code tonight.
Again, thank you all for comments 😃
Hi there,
I am having problems with my heating and hot water. They work independently using the programmer but not both together. Have read lots of posts here about this particular programmer but not found a solution. I have isolated the programmer from everything else and then tested the...