please help - hot/cold climate controls don't work, only blows hot air

Hi gang, I've searched google and this forum and can't find any guidance so far. No matter whether I set my climate control to blow hot or cold air, it only blows very hot air out of all vents.

A little history (of course I get myself into these situations)

I had the common problem of the 1,2,3,4 fan speed setting being stuck on a single setting, in my case at 4.

I diagnosed the blower fan resistor INCORRECTLY as a climate control panel problem, and replaced the climate control panel with one that was supposed to be a replacement for my 2008 Mustang. Fun thing happened when the replacement arrived - I noticed the 2 electrical connectors on the back of the climate control panel were rotated differently and the assembly was a different method, HOWEVER the 2 electrical connectors fit just fine. Had the same problem, fan still worked on setting 4 with no changes in speed on the control. At that point I went to research correctly, and replaced the resistor.

NOW all the fan speeds worked, but the AC would not turn on.

So then I put the original panel back in. Now everything appears to work fine EXCEPT all I get is hot air.

Any hope or ideas for me? THANKS GANG!

Thank you Bullitt95, yes the AC compressor clutch engages but then about 3 seconds later it turns off. Then after about 10 seconds on then off again.

Thank you Bullitt95. This appears to be resolved.

Yesterday I took the climate panel back out, hit all the connections with electrical contact cleaner and re-installed it and magically I have heat and cool controls with full functioning AC / climate control. It appears a connection in the back of the climate control panel that manages heat/cold setting wasn't making contact. There were no bent pins.