99 GMC Suburban A/C problem

[clarioncall]

The front air is not working at all. Rear air works fine, the compressor is cycling, fuses are all good and I've just replaced the front blower. Still nothing happens up front. Any ideas?

[zebra308]

My '97 had a similar issue. It would blow ice cold air out of the rear and nothing but hot air from the front. I ended up having to replace the compressor. I'm going from memory (about 2 years ago) so I'll have to check and make sure.
My A/C guy had to install a T valve in the heater line so I could shut off the hot water feed in the summer to the heater core. Before he did that, the air coming out of the front A/C vent was mixed with heat from the core. Seems the factory valve for doing this was not functioning properly and it allowed some hot air into the vents from the heater core.
Hope this helps.

---------- Post added at 12:11 PM ---------- Previous post was at 12:09 PM ----------

Sorry, but when you say nothing is happening.. I'd check the fuse panel for a blow fuse??