Unit won't cool below 38 degrees

you got the 4 corner holes plugged. your belts tight

 

I'm not a reefer mechanic but I've had that same thing happen before. Our shop had me manually defrost it. I did that an it cycled through an back to normal operation. After that it worked fine. If that don't do it ya may have had a sensor go bad.

 

yea that humidity will take them longer

 

Hot product on the trailer ?
Units are designed to maintain product temp not pull it down .

 

Could be low on freon again.Check if the ball is floating on the sight glass on the receiver tank.Other than that it could be many causes.Tx valve,sv4,sv2,valve plates,etc.

 

My Reefer was set at 38° Before the controls and screen locked up like this. It turns on and starts cooling to 38° but the screen never blinks and the buttons don’t do a thing.

 

What unit, what year unit? And hours? What product?

 

I just replaced the control panel. That fixed it.

 

i just got done replacing all my ac parts. pulling a vacuum and then charging freon. happy father's day everyone