A/C only blows one side on 1990 Chevrolet S10 Blazer

I have a 1989 Chevy S10 blazer. When I turn on the A/C, no air blows out the passenger side vent and the right vent in the middle of the dash. Waht is causing this? Thanks.

by in Muskogee, OK on June 12, 2011
1 answer 1 comment
ANSWER by on June 12, 2011
Most likely a blend door not being operated correctly, the heater controls need to be tested. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online
COMMENT by on July 17, 2011
Thanks. After reading this, I had it checked out and that was the problem (blend doors). Thanks again.