Ok. Ranchio 3 system with valve monitoring. System has worked fine for 2+ years, no changes. 16 zone Ranchio 3.
14 zones in use.
Today while starting up after winter. Everything seemed fine. That is to say all the zones I tested worked as expected. I ran several zones with the quick run for 10 mins.
Then about 30 mins or so later 3 zones in the same valve box. Zones 10, 11, 12 all began to report open line and very low mA.
Ive measured 24v to the solonoid. Ive replaced solonoid. Ive replaced valve. I opened and replaced the waterproof wirenuts. Im open to suggestions at this point.
I tried moving one line to zone 16 and then running zone 16. That didnt work either. Help? Thoughts?