A/C 'O ring replacement

[fljackson]

I have a '90 Mark and my A/C started to blow warm air. I re-charged the system and the A/C worked for the same day. The next day it was warm again.

I understand a common problem is the 'O' rings.

Does anyone know if this is likely the problem and if so, how do you replace them?

Thank You in advance.

 

[460 Tzilla]

I have a '90 Mark and my A/C started to blow warm air. I re-charged the system and the A/C worked for the same day. The next day it was warm again.

I understand a common problem is the 'O' rings.

Does anyone know if this is likely the problem and if so, how do you replace them?

Thank You in advance.

Sounds like you deff. got a leak...AC shops normally use a injected dye to see where the leak(S) is...Auto parts stores sell o ring kits and it is not hard to change out..............Good Luck easy fix if its the o rings

 

[Elessee]

While O-ring replacement might be relatively easy, there are lots of possible leak points or maybe the problem is not a leak at all.
(Google "air conditioning o-rings" and there's a video near the top of the page of hits.. a Ford Explorer o-ring replacement..)

My AC went warm before summer of '08. While I'm up for just about anything mechanical, I never even considered trying to diagnose and fix the AC myself..

It cost me $131 for 2lbs of freon (they saved and reused what was left in the system), $75 for labor, and $20 for ultraviolet dye. Total near $221. The ultraviolet dye indicates any leaks. I never went back to have them check for leaking dye..

You can tell if a coupling or connection is leaking because freon is an oil at normal temps and pressures, and attracts dirt. (I once found an empty 20 gallon freon drum and there was a residue of clear oil on the bottom..)
Anyway, if there's a bunch of black dirt accumulated near something like the o-rings or a hose connection, it might indicate a leak.

i'd recommend letting a shop do it.. they have all the equipment and practiced skills..