location ford chassis airconditioner for 2008 Georgetown 378XL

[jdlawrence]

My 2007 ford chassis air conditioner stopped putting out cold air. I found the unit (large black box on front right of engine compartment) but cannot figure out where the low pressure valve is. I found 2. one near the black box the other near the cooling grid. ANY HELP.

[abjb]

Here's a YouTube link that explains the 2 connections, hope it helps.

https://www.youtube.com/watch?v=l-gD3zq5flw

[jdlawrence]

Thank you. Found the low pressure line. However, it seem that is not the problem. The pressure is fine. The AC unit is in a large black box on the upper left I cannot get inside. I think clutch does not kick in. I found where the fuse/relay is in the power distribution box. Do not know how to check this small black cube and I cannot remove it. Any idea. I live 25 miles from the near RV service.

[mogman]

If you get under the right side of the engine you will see the compressor, and can check if the clutch is in and the comp is running. If you see a lot of oil around the area it usually means the seals have blown, and you get to take it to the Ford Truck dealer to replace the compressor.

[Batts-toy]

Originally Posted by jdlawrence

Thank you. Found the low pressure line. However, it seem that is not the problem. The pressure is fine. The AC unit is in a large black box on the upper left I cannot get inside. I think clutch does not kick in. I found where the fuse/relay is in the power distribution box. Do not know how to check this small black cube and I cannot remove it. Any idea. I live 25 miles from the near RV service.

I had the same problem, the AC was working but blowing out hot air. I tracked it down to a little black box (hot water flow control valve for heater) in front of the radiator, a heater hose goes in one side and out the other then on to a larger black box (heater radiator). I took the small black box apart and had to special order a new hot water control valve and replaced it, problem solved. Though the AC part was doing it's job cooling the water leaking by the water valve heated the air right back up thus hot air out the inside vents. I also checked the clutch on the compressor, had to crawl under the MH and look up to see the compressor mine was working as it should that is why I kept hunting and found the bad water control valve.

[bill0830]

I know this is an OLD post, but I have the very same issue. I am going to try the black box trick and hope it works. When it's nice outside and no AC needed very comfortable ride, but even running one of the bus A/C units and generator, there just isn't enough air flow to the cab. I sure hope this works. Thanks for the ideals.

2008 Georgetown owner