Air conditioner not blowing out vents
#1
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Location: Sacramento CA
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Air conditioner not blowing out vents
1995 g-30 cargo van
Blower motor went out, replaced with new unit motor now spins but doesn't blow air out of the vents. I can open the door (not sure what it's called) that is just inside van and fan blows air there but just doesn't seem to shift to the vents, no manual so don't know where it's supposed to shift from floor to A/C vents. Any help on troubleshooting this would be great since i really don't want to rip the dash off to find this fault THANKS Jim
Blower motor went out, replaced with new unit motor now spins but doesn't blow air out of the vents. I can open the door (not sure what it's called) that is just inside van and fan blows air there but just doesn't seem to shift to the vents, no manual so don't know where it's supposed to shift from floor to A/C vents. Any help on troubleshooting this would be great since i really don't want to rip the dash off to find this fault THANKS Jim
#2
CF Monarch
Look under the dash at the a/c unit. Is there vacuum hoses to it? I'd suggest run a new temporary vacuum hose from the accumulator pot under the hood towards firewall with a hose to the control valve. You could have a bad vacuum supply hose, see if that works, if not, probably the valve. Also with the hose off the control valve, and running, see if you can feel vacuum.
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Tanks for the reply, All vacuum lines have been checked and connected. My understanding is that if vacuum lines were disconnected or bad that the havc would default to defrost is this true or false? Where is the control valve your talking about? Is it the one that controls the door or? As I'm sure your aware of finding these things under these vans sucks So location would helps tons Thanks again Jim
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
#4
CF Monarch
Tanks for the reply, All vacuum lines have been checked and connected. My understanding is that if vacuum lines were disconnected or bad that the havc would default to defrost is this true or false? Where is the control valve your talking about? Is it the one that controls the door or? As I'm sure your aware of finding these things under these vans sucks So location would helps tons Thanks again Jim
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
#5
CF Monarch
Tanks for the reply, All vacuum lines have been checked and connected. My understanding is that if vacuum lines were disconnected or bad that the havc would default to defrost is this true or false? Where is the control valve your talking about? Is it the one that controls the door or? As I'm sure your aware of finding these things under these vans sucks So location would helps tons Thanks again Jim
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
P.S. if the control valve is bad could it just be forced to stay open so wife won't die in the Calif heat till this weekend for me to repair
#6
CF Veteran
the vacuum hoses are probably deteriorated and dry rotted. you will have to run new hose to the T on the back of the throttle body. I did this a while ago, super duper easy once you remove the doghouse. What is happening in your case is the hose that connects the vacuum reservoir(the round black toilet bowl thing mounted to the underside of the hood) is either missing, broken or disconnected. Without that reservoir the air only blows to the base of the windshield.
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