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stadler zone valves

Joe_70
Joe_70 Member Posts: 12
anyone know the resistance on one ?? and anyone know anything about the manifolds..i had 7 out of 10 zones not working ..all have 24v to them but won't heat the rooms they are suppose to....when i open them manually they heat fine....WHAT DO YOU THINK THE CHANCES ARE THAT 7 ZONES GO BAD AROUND THE SAME TIME !!!!
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