A tip for better AC-clean your box!

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2nup350

the four doors are mandatory
Joined
Jan 6, 2013
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Location
Cataula , GA
This might be old hat for most of you but here it is anyway. As part of my ongoing rebuild efforts I took the heater/evap box off and look at all these leaves! I figure most of us have the same problem. Taking the box out is a bunch of work, but there is no reason you have to because with two screws you can take out the heater blower resistor from the passenger footwell. The resulting hole is small but with some duct tape, rubber hose and a shop vac you can get into there and suck out all the garbage that's undoubtedly plugging up your air conditioning box. Also, if you are going to take the evap box off, get your shop vac with a plastic "P" trap taped to it and vacuum out all the crap accumulated in the fresh air intake above the mushroom.

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As someone who used to service residential/ light commercial HVAC, it has always amazed me that vehicles generally DO NOT have any provision to keep the evap or heater core clean, or to flush the fin area
 
Heaters have the same possible issue's.
About 1/3 of my heater box was plugged up like that.
 
Well it's not just old cars, when I was working for the Cadillac/Olds dealer back in the day a customer came in with a nasty smell. New car & mouse nest, not only did it plug up the cores the mice got in the fan cage and it was all fun running around until the blower came on, then mice parts everywhere, and I had to clean it all up. Warranty void on that one.
 
What's a warranty void mean?

It was a new car and the repair would have been under factory warranty but because the damage was caused by a rodent the factory wont pay so the customer has to foot the bill, and the repair pays me the time it takes not warranty repair time witch is is about 2/3 the time, so I got paid more than the factory would have paid me for the same job.
 
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