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94 s350, 93 dodge cummins 250
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95 Posts
Discussion Starter #1
94 s350
my ac works great but in 90 degree weather when i shut the car off then restart after going in a store my ac compressor wont engage.

if i shut the car off and restart it the compressor will then work

i checked codes and got 13 which is rear ac controller or something like that but i dont have rear ac, no other codes

it does not happen in cooler weather and there are no other climate controll issues

im stumped

Steve
 

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92 W140 300SD 97 VW Jetta TDI 89 VW Fox diesel
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996 Posts
Mine has done that once. Shut the car down for a quick trip into the store and back out and the AC wouldn't come back on. The AC later came on just fine.

I have always wondered if it was related to condenser temperature? It would certainly be warm after you shut it off.
 

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94 s350, 93 dodge cummins 250
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95 Posts
Discussion Starter #3
yeah i hosed the radiator down with a hose and the compressor kicks in so does that mean a charge problem?

i am stumped, never had a car do this before

Steve
 

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92 500SEL to 01 E320T current 2014 lexus LS460
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3,886 Posts
On my 92, when acceleratig hard the compressor would shut off, but it would come back on with re-start. It seems the system compares engine speed with compressor speed, and in my case it was a slipping fan belt. They replaced the tensioner, many years with no problem
 

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92 W140 300SD 97 VW Jetta TDI 89 VW Fox diesel
Joined
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996 Posts
yeah i hosed the radiator down with a hose and the compressor kicks in so does that mean a charge problem?

i am stumped, never had a car do this before

Steve
I doubt that it's a charge problem but you could have a shop put gauges on it to be sure.

I'm still thinking it's condenser temp but have no real proof. I do know it's no fun when it does it....

Steve
 

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94 s350, 93 dodge cummins 250
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95 Posts
Discussion Starter #6
Glen i agree with the condensor temp issue and will remove the fans and check for cleanliness of the fins.

will post results when i do it

thanks....Steve
 
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