Why does my car run hot when the A/C is on?

[Guest Anonymous]

New after market ac with electric fan. Its fine until I turn it on, then it gets hot. Is it the extra load. I know the condenser blocks the air flow, but that`s the same on or off. Does the compressor slow down the fan? I have a good 320 radiator- tropical fan- the cooling system was working ok before I put in the ac.

What should I do. The ac must stay!

Thanks

[Napes]

thru the radiator, but that the air coming out the back of the condenser is hotter than ambient air. That's what it's doing, removing heat from the freon. My engine temp goes up a little higher in the summer when I go to Tucson, and, naturally, up a little more in Phx. But, except in maybe real slow stop and go traffic, I can run mine flat out in the summer. Where I live, in Nogales, it's never a problem. This is in my ' 75 automatic w/ Behr air, but my wife's ' 76 w/ Clardy is the same. Both cars now have rotary compressors.

[Guest Anonymous]

Thanks-that makes sense, but mine will run hot now, in the winter, as soon as I turn it on. I have`nt had it in long and I`m working on the body so I have not had a chance to play around with it yet.

[Guest Anonymous]

What new system did you go with? How was the install?

Any pics oh the consol in the car?

Thanks, Jim

[02jake]

most cars with a/c have 2 fans. one runs with the engine on (mechanical) the other in a push fan in front of the condensor and is electric and only comes on when the a/c is switched on. It also is a two speed fan. As the temp rises a relay will switch on to speed two. Is your rad a new rad or is there a chance the flow threw the rad is partly blocked. Also check the pres. in the a/c make sure they are with in spec. To much freon will also cause a high temp. Have fun.

[Guest Anonymous]

Thanks jake!