1998 Blazer A/C blows hot air.When I turn on the air conditioner it does not click. However, hot air still comes out of the vents instead of cold.

Steve Allison

• 5569 Answers
• Posted on Aug 18, 2009

SOURCE: Cold Air Not Blowing Through Vents

Your last guess is probably the right one. The deflectors/directors are vacuum controlled and you may have vacuum line either broken or disconnected; these aren't fun to find. I would start under the hood and make sure the vacuum reservoir is intact (have seen them cracked) and then start tracing hoses from there.

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SOURCE: Heat wont blow through heater or defroster vents

common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

SOURCE: 2004 chevy subarban blows cold air on one side hot air on other side

i was a GM mechanic for many years, the problem you are having is one of your mode door actuators has gone bad, most of the time it is the actuator on the drivers side that causes the problems, i have seen this many times, sometimes you can take it to the dealer and they can hook the computer up to it and recalibrate it but most times it has to be replaced , it is located under the dash in the area above your gas pedal.

SOURCE: ac blowing hot air

the blend door actuator located on the air box (right hand side under dash) is prob. inop. worst case senerio the blend door its self is broken. I have replaced the actuator more than anything.

Ronny Bennett Sr.

• 6988 Answers
• Posted on Jul 05, 2010

SOURCE: 1998 Malibu 6 cyl. Air conditioner works fine -

There is a temp door actuator motor that is not working,it is on top of the blower box,where it is mounted,the dash will have to be removed to replace the actuator motor.If this was at all helpful,please rate,thank you.