sleeper AC question

low on freon or heater letting hot water past cut off valve.

 

Air blend door in the ducting under the bunk not closing properly, thus allowing the cool air to mix with hot, compromising the cooling capability.The HVAC under the bunk is a separate system from the one in front, but uses the same compressor on the engine, therefore requires the engine running, and the front AC turned on (to control the compressor).

 

try turning off your water valves to the sleeper. if the engine has them. it's what fixed my bunk a/c

 

We have an AC Fan that run off of the 800 watts inverter & it does a fine job circulating the air around the cab.Also make sure if you have a recycle button for the AC on your dash to use it. Which will only recycle the cool air inside the truck and stop drawing humid air from outside the cab.

 

I have the same issue in my 2013 t660..had kenworth replace the blender door but still rear a/c don't work properly..Its been to kenworth 4 times..still not fixed and they cant figure it out either..LOL

 

Thanks for post have they found out yet mine is the same?

 

Need help the sleeper just blows out hot air the truck has a new compressor, drier, and expansion valve. Does the sleeper have different Ac components? The compressor stays engaged while the sleeper is on I even shut off the front Ac in the cab any comments would be greatly appreciated

 

The most common cause of this problem which I've encountered on the T660 was the heater control valve under the bunk. There should be some coolant lines coming off the right side of the engine.. they should have valves attached to them... identify the one which goes to the sleeper heater core and close off all flow through the valve. If the bunk AC suddenly gets cold at that point, the heater control valve is your culprit.