One of my zones isn't circulating. Was fine a few days ago (zone not used constantly), been in service for 6 years.
Being somewhat ignorant I replaced the cartridge in the Taco 007. no change. disassembled it again and tested power to the impeller. aok. re-assembled.
Argo control board lights properly when the tstat calls, taco works. what the 'ell else can it be? Ahhh what about that red thing over there?
yes being somewhat ingnorant i thought the red thing was on the return -- not the supply. (esp since the tacos are warm/hot and that is not. I found a doc at Xylem/BG site for the flo contorl valve sa1 3/4 it shows an exploded parts diagram and talks about cleaning.
Does blockage/failure of the valve seem to be the culprit?
It certainly seems so -- no leaks anywhere, working ok a few days ago. Not a complicated installation -- But I don't have isolators on both sides of the valve -- so I'll have to drain -- not fun in the winter.
Anybody know why it would require cleaning? or have any pointers on the process? thanks, bryan