Just recently I have worked on a bunch trane little 5 ton voyagers. I came accross a weird issue. When you turn the disconnect off and then turn it back on, the supply fan bangs on right away. U sually there is like a 15 seconds delay before if comes on. These fan run all the time and they stage heat and cooling as they need it. So I have checked the TCO2 sensro (high limiut cutout) which usually makes the fan come on right away. But it was good. And If it was bad the heat wouldnt come on. And the weird thing is that the unit works totally fine. I just cant figure out why is it doing that.
Did anyone came accross this issue too.