Problem with front Coleman MACH A/C unit

[flyboyinva]

I have an issue with one of my two Coleman MACH heat pump roof top units. The units are on a 2005 Fleetwood. The rear unit works fine and the front did a few weeks ago. If I set the thermostat to auto, nothing happens. Turn to fan settings and the fan comes on. Last year the starter capacitor was blown. I replaced both the starter and the run capacitor. I removed the cover and checked both capacitors. They look fine to me. The last time I could tell right off the starter capacitor was blown. I tried a spare starter capacitor and nothing happened. I checked the breakers and made sure I was operating off a 50 amp service. I also tried running on generator power. No go. Any ideas will be appreciated. Thanks

["007"]

Can you find 110 in junction box of AC unit, from your load center where you reset the circuit breaker?
Also wire nuts some times come loose.

[flyboyinva]

Wiring document

["007"]

You have a bunch of wire nuts inside your AC but you still have a 14 gage wire from your load center braker switch with connections for AC 110 v supply with wire nut connections. Maybe in ceiling if you take off cover inside off AC or still in AC unit its self after taking off roof cover.
If you have 110 feeding AC no problem than.

[Gary RVRoamer]

If the fan doesn't run when the t-stat calls for cooling, it is not a start capacitor issue. Either the t-stat did not send the signal or the control board failed to recognize it. The Fan Only signal is a separate one, as I understand the way these work.

Also, if you have one of the mutli-zone digital thermostats like the Atwood Comfort Control, there is a relay box between the t-stat and the a/c itself. If it craps out, it may not be passing on the "cooling needed" signal to the a/c's own controller board.