379 pete sleeper heat and a/c problems

I have a 94 379 pete and I'm having problems with the A/C in the sleeper.It has a ac,off,heat switch when I put it on ac the blower blows but and ac.But when I put on heat the blower stops working and nothing comes out.The ac works fine in the cab I have replaced the ac line and charged the system so if anyone can help please thanks.

 

I'm still having problem with the ac in the sleeper of my 379 pete blower works but no cold air system full of freon. Any idea ???

 

thanks for the info seadog I did cut off the water which expansion valve are you talking about the one on firewall or the one in the sleeper??

 

The system in the back has a evaporator and a expansion valve mounted under the bunk with to lines running from the expansion valve on the firewall

 

Well I worked on the ac today still no ac in the sleeper I put a new expansion valve,both new lines, and recharged the system. Two weeks ago I put a new compressor,dryer,and thermostat air is working good in cab.The only thing I can see that is left is the switch or a relay if there is one?????