I've encountered a very strange problem with a VAV terminal that uses a T-19 stat, and a reversing relay for the damper motor/reheat valve.
The reversing relay was constantly bleeding air, so I replaced it yesterday.
Today I got a call that the thermostat is now constantly bleeding air when it goes into a call for cooling! I've tried different stats, but they all do the same thing.
Any comments or suggestions would be sincerely appreciated!