A/C

[Chrisgenet0]

Trucks a/c went from not super cold air,but comfortable,to blowing just straight on hot heated air..then,started blowing just almost comfortable air again.So bought some freon,it took,almost a can...but still no cold air...Seems no switching sounds of hot to cold,,and seems should blow alot harder.any ideas on this. Could that be a blend door problem. 

[silveradosid]

what make and model of truck

[Jsdirt]

Sounds like a blend door issue, for sure.

 

Feel the A/C lines going thru the firewall. Both should be cold. If you live in the Eastern part of the USA, you'll have condensation forming on the accumulator and the low side line headed back to the compressor. The clutch will either be running non-stop, or cycling occasionally, depending upon the heat load in the cab. If the clutch "short-cycles", then you're low on refrigerant. If the lines are cold and clutch is operating normally, then you've got a blend door issue.