Question about Cars & Trucks
I don't know the specifics of your vehicle. However, this is generally a result of a cracked or broken vacuum line. This is what I would try if possible for u to do so. If you have someone who can help switch the heater from cold to warm inside the vehicle. Raise the hood if the vehicle and listen for hissing air. This would definitely be your problem. I have actually made temporary repairs to cracked or broken vacuum lines with tape. Usually the cracked line will be found close to the cowl or fire wall. This will be the part of the engine compartment that runs directly below the windshield. All though rare sometimes this issue occurs under the dash as well but di to the extreme temperature changes under the hiid this us where it is most likely to be. Keep ur fingers safe and away from moving parts. Sometimes u can feel what u cant hear. Hope this helps and good luck.
Posted on Nov 09, 2014
Testimonial: "My car is a 1992 Buick regal custom 3.8 I think it is the blend door actuator"
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Posted on Jan 02, 2017
Actuator motors either get a tear in the rubber or a hose is broken and not letting vacuum assist in its opening.
You can try moving the lever by hand and see if the air gets colder on the bad side.
Posted on Aug 04, 2009
I had this exact problem in a 2000 and it ended up being the air filter (engine compartment, pasenger side cowl)-all I did was replace it and both sides worked properly-you could try removing it and see if that solves it, if not I would think either the climate controller has a problem (vacuum line?) or maybe the blend door itself needs to be adjusted-hope this helps
Posted on Jun 26, 2011
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