when you have the air conditioning on, does the compressor run constantly? mine clicks on for about 5 seconds then clicks off, runs again then cuts off again.

 

I think the freon is getting low.

 

It should run longer the 5 seconds

 

But it does not stay on constantly

 

Have you ever had the ac / heat box out?

 

have you ever taken out the heater/ac box assembly?

 

If not , you would not believe the amount of stuff that is in it, leaves etc....

 

I can almost guarantee the evap is bad.

 

cutting on and off, more than 10 times a minute, it a classic sign of low freon. You've got a leak somewhere. I'm going to load some Red Angel A/C stop leak into mine tomorrow if my dye injector comes in tomorrow, I'll let you know how it works.

Here's a really good and easy gauge to check your freon with. Just hook it up to the low side:
http://www.harborfreight.com/cpi/cta...emnumber=95808

 

thanks aim. zman, did you really just post 7 times in my thread?