Thread: Aftermarket A/C - Blows cold, but doesnt cool off the car

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Here is something to check. I recently installed a new Vintage Air, generation 4 air conditioner in my 47 Chevy. It was blowing at 38 degrees, but I was not real happy with the volume of air it was blowing out. I checked the voltage at the blower with it running, and found that it was over two volts lower than the battery voltage. I ran a separate 12 gauge power wire from my battery cable into the car just to power the air conditioner, and used a relay triggered off the ignition switch to control it. Problem solved. It made a large improvement in the volume of cold air.

Also the quality of your fan at the condenser makes a big difference, especially when you are stuck at a stoplight. Adding a bigger fan, or building a shroud, or adding an extra pusher fan in front can really help.

I checked the voltage on the fan. Its 12 volts. The car has a nice fan shroud and electric fan. I had added a couple pusher fans in front of the condensor several months back to aid with cooling issues, should one come up. Only things left would be to check the pressure again, and add window tint. Thanks for the replies.

Originally Posted by Chicken Legs

I checked the voltage on the fan. Its 12 volts. The car has a nice fan shroud and electric fan. I had added a couple pusher fans in front of the condensor several months back to aid with cooling issues, should one come up.

With a quality electric fan properly shrouded to pull through the whole radiator area I believe that adding pusher fans will actually diminish your cooling by blocking air flow through a significant portion of your condenser area even when they're running, but especially when they are "off". Even if the blade were to freewheel (which it likely won't), they will still be blocking area with the frames. I'm not a fan of pusher fans unless they are the absolute last resort due to not having clearance to pull the air through the radiator & condenser. Just my $0.02 on electric fans.