This zone valve goes to my attached garage & thermostat controls temperature. When
it gets cold outside, it stops working in the auto mode, so have to turn to manual
so get heat from the house zone. Sometimes it goes back to auto on its own. When I
say cold outside, its when wind chill is low or below 10degrees. I've replaced zone
assembly, but not the copper body the unit fits in. Any ideas why zone valve
doesn't open when cold & could it be the zone copper body that holds unit.
it gets cold outside, it stops working in the auto mode, so have to turn to manual
so get heat from the house zone. Sometimes it goes back to auto on its own. When I
say cold outside, its when wind chill is low or below 10degrees. I've replaced zone
assembly, but not the copper body the unit fits in. Any ideas why zone valve
doesn't open when cold & could it be the zone copper body that holds unit.