Reader Question Hello Austin,
I have a 1990 Chevy truck 4x4, 5 speed, 4.3 engine. I cracked off my hi pressure switch, the a/c worked for 2 days then stopped. i took it in and they replaced it with an after market one, it has 2 wires on it , but they hooked up one cause my old one only had 1 wire.
I took truck home and the a/c quit working. i took it back for a compressor and it was making a noise, so they changed it out for me. but they can only get 1.5 lbs of freon in it.drove the truck home and within 4 hrs, the compressor was turning on and off, cause it was loosing freon.
So I took it to another mechanic and he checked it with a Geiger counter, and found a leak at the bottom of evaporator. so i took it back to the shop that changed compressor. it lost .8 of the 1.5 lbs of freon.
So they filled it back only to 1.25 lbs this time. when i revved the engine they got anther .5 lbs in system with dye. and their was no leaks with the geiger counter and the infer red lite.
I took it for a ride and came back and still no leaks could be found. it is only blowing 62 degrees now. on the 2nd compressor it was blowing 38 degrees unless their thermometer was wrong , cause it didn't feel like 38. but it feels like 62 now.
Before i cracked the high pressure switch when i put the fan on medium or high it would kick up to a higher speed on its own for about 5 minutes until the cab cooled off, then it would drop down to its normal speed again. and now it doesn't do that it just stays on where i put it it doesn't change any more. why?
My ac evaporater drains out alot more water now too. i had my truck for 10 yrs and it always left a puddle about 12 inches, but now its about 3 feet of puddle. why? and why can,t i get 2.8 lbs of freon in it now.
Before it broke i had 2.5 lbs of freon and it was blowing at 48 degrees. because i cracked the high pressure switch and ran it for 4 days my a/c system is falling apart. i have $850 in it already and if its the ac evaporater thats anther $ 600. so how do i get more freon in it. nothing is leaking now but its not as cold as it was. what should I do.
To read the full article, visit Myhonestmechanic.com