I found the trane unit that serves the entry was not running I found the roll sensor had fail and was a short to the transformer. I replaced the roll out and ran the system through a heating cycle. At this time this unit is running as it should be. He also has another unit not running heat for the break room which is a York. I found it has a bad ignition board and he is choosing not to fix at this time due to this area has 2 rtu but with one running it keeps it warm enough. This was not on any of the units that we replaced