Weird ac problem
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Joined: Feb 2010
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Weird ac problem
I got 95 ford f250 diesel 5 spd today I took my truck after lunch too work I started the truck put the ac on and I drove to work about 10 min I get to work so I had few minutes I stay in the truck with ac on . After about 4 min the ac start getting weaker and weaker and start blowing warm air so I had to go back to work . After work I came out start the truck turn the ac on it was blowing warm so with the ac on I started driving home after about 2 min off driving the ac got cold again . What is the problem is about 85f out today help me out
Logistics Pro
Joined: Jun 2009
Posts: 4,116
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From: metairie, LA
it could be a number of things. a weak vacuum pump would make the blend doors not work properly. a low charge would require more air flow over the condenser and higher compressor speed. 85f is not hot enough to cause problems.
Hotshot
Joined: Aug 2006
Posts: 10,764
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A few WAGS
You need to take a look at the compressor clutch when it is getting warm. If not engaging , may need to remove the washer from behind the clutch & put a thinner one in ..(air Gap) may be to large. The condenser may be clogged with dirt . May be low on refrigerant also...
I also agree on the vac pump may not be closing the blend door..Sometimes a pen or pencil will fall from the glove box and bind things up...
You need to take a look at the compressor clutch when it is getting warm. If not engaging , may need to remove the washer from behind the clutch & put a thinner one in ..(air Gap) may be to large. The condenser may be clogged with dirt . May be low on refrigerant also...
I also agree on the vac pump may not be closing the blend door..Sometimes a pen or pencil will fall from the glove box and bind things up...
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Logistics Pro
Joined: Jun 2009
Posts: 4,116
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From: metairie, LA
What kind of gauge are you using? Is it the one that comes with the can or a real dual set? The low side connection is on the accumulator by the firewall. The high side is closer to the front of the truck on the smaller line.
Fleet Owner
Joined: Aug 2004
Posts: 20,418
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From: AZ
Mine has stopped working a couple of times and the plug on top of the compressor needed cleaned. Then it still would kick on and off. With a running engine and the ac on wiggle the plug and see if the compressor will kick in. On mine I used a plastic tie and pulled it over towards the middle of the engine and it has not failed me sense.