FAN/AC Problem
Thread Starter
|
New User
Joined: Dec 2003
Posts: 23
Likes: 0
From: Millbrook NY
FAN/AC Problem
Greetings, I have a 2000 ext. E350 W/ 94,000 miles on the 5.4. I frequently tow a 6x10 trailer during the summer with the ac blasting. Never any problems. However, last night I had about 700lbs in the van and 500lbs in the trailer, all of which usual w/ the AC on. After about 30 min. of driving the AC just went off. All my gadges were fine though. Now when I say the AC went off and fan went off as well. the whole system shut down. after about ten minutes of driving i tried again. it working great for 10 minutes or so. This happened for 30 minutes or so, then I called it quites and opened the window. Now yes, it was hot last night but enought for it to be a problem. What could this be? The engine was never overheating. Can coolant go bad? Is there some sort of auto shut off to protect the system? Any info on this problem would be great.
Thank You, Tyler
Thank You, Tyler
Elder User
Joined: Feb 2006
Posts: 592
Likes: 1
Well, it's kind of confusing. I don't think its anything to do with the A/C itself. If it was some kind of protection, the fan would remain running. Are you sure it wasn't just the fan cutting out? Did you put the climate controls just on fan to see if the fan would run in that position? Try that next time it kicks out.
Anything to do with the refrigerant would not shut down the fan. I'm wondering if your fan is going out or you have an overheating fan motor connector somewhere.
I haven't had to diagnose a fan problem on the newer vans yet. I have done it on my 89 and they sure do everything they can to screw up the circuit by routing both sides of the fan through controls, rather than just putting one side to ground, and then controlling the positive side of the circuit.
You'll be hard pressed to find the problem unless you can get it to do it multiple times.
Anything to do with the refrigerant would not shut down the fan. I'm wondering if your fan is going out or you have an overheating fan motor connector somewhere.
I haven't had to diagnose a fan problem on the newer vans yet. I have done it on my 89 and they sure do everything they can to screw up the circuit by routing both sides of the fan through controls, rather than just putting one side to ground, and then controlling the positive side of the circuit.
You'll be hard pressed to find the problem unless you can get it to do it multiple times.
Posting Guru
Joined: Feb 2007
Posts: 2,351
Likes: 8
Double check to be sure the blower is not still actually running. A common fault is the closing off of air ducts by an errant vacuum motor, leaving the blower struggling against a closed off duct. My guess is that both the AC compressor & blower are still running. Tracing where the control vacuum is being lost is a PITA. I cheated & locked the rear AC vacuum door in the AC open position.
I had an additional problem of greatly diminished air flow that I traced to an accumulation of nasty crud on the front AC evaporator fins. Search this forum, I posted on it.
I had an additional problem of greatly diminished air flow that I traced to an accumulation of nasty crud on the front AC evaporator fins. Search this forum, I posted on it.
Mountain Pass
Joined: Jul 2008
Posts: 114
Likes: 5
Double check to be sure the blower is not still actually running. A common fault is the closing off of air ducts by an errant vacuum motor, leaving the blower struggling against a closed off duct. My guess is that both the AC compressor & blower are still running. Tracing where the control vacuum is being lost is a PITA. I cheated & locked the rear AC vacuum door in the AC open position.
I had an additional problem of greatly diminished air flow that I traced to an accumulation of nasty crud on the front AC evaporator fins. Search this forum, I posted on it.
I had an additional problem of greatly diminished air flow that I traced to an accumulation of nasty crud on the front AC evaporator fins. Search this forum, I posted on it.
can anyone tell me where to find this vacuum line or valve? in my 03 e350 my air blow fine for 10-15 minutes then dimineshes greatly and the fan gets loud like it's blowing against a closed gate valve.
Thanks,
Andy
