97 Suburban Rear A/C not cool

[h2012]

Does anyone know what would cause the rear A/C to blow warm to barely cool air. The front A/C blows cold. The compressor has a full charge. I think it might be a clogged orafice tube filter but I have no idea where it would be located for the rear air. Could anyone please let me know if my assumption is correct or if there is something else I should check. Thanks

[NoEcm]

Probably the rear expansion valve.

Look here:
http://www.acsource.net/acforum/


and use this as your search parameters:

suburban and expansion and valve

[dangerous]

me too !!!!!!!! thanks - great link

[acme1]

Where is the expansion valve located on a 96 suburban and do I need to discharge the system before replacing it?

[CalessaSSracer]

Were is the location?

[grumpy5]

Look at figaros post for his 99. It appears that even if your pressures are good you still may not have enough volume of freon to satisfy both systems. I added two cans to my 99 and my bro-in-laws 96 and they both started blowing colder in the front. I have since lost some of my coldness. Now I have to look for a leak. Hope this helps.