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Diagnose a/c problems

Why a/c does not blow out cold air

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Heater in 1995 Bronco is blowing cold air....What could be causing this?


If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well. The following are some issues that may be causing the heater to blow cold air:
  • Low coolant levels
  • A plugged/clogged heater core
  • A faulty thermostat (thermostat that is stuck)
  • Broken blower and/or blower motor
  • Heater core bypass hoses that have leaks
  • Heater core bypass hoses that are worn
If your car is overheating and/or your heater is not working, it should be inspected and diagnosed as soon as possible.

Nov 15, 2016 | Cars & Trucks

2 Answers

I have a 98 Buick Lesabre Limited. It blows Cool air, but not Cold.And also, I can't seem to make it blow out of the Center Dash Vents.


Cornelius, vent problem could be a pinched or loose vacuum line on controller,faulty AC vacuum motor, faulty AC programmer,etc. needs to be checked out by a good Tech, diagnosed and estimate on repair.
As far as vehicle only blowing cool air, issue could be blend door issue, plugged AC condenser core dirt/debris, low AC refrigerant, plugged AC lines internal, failing compressor, etc., again should be checked out, diagnosed and estimate for repair by a good Tech.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
1998 Buick Lesabre No Air From Dash Vents
http://repairpal.com/ac-vent-problem-346
Car AC Not Blowing Cold Enough Car Repair Information From MasterTechMark
My Car Is Not Cold What Could be Wrong Elite Auto Repair

Jul 15, 2016 | Buick Cars & Trucks

1 Answer

No heat/airconditioning in Lexus RX 330


The warning lights are probably not related to no heat, unless the engine is low on coolant.
It sounds like a problem with the blend doors under the dash, or the main controller. You may need a shop manual to diagnose it.

Sep 27, 2013 | 2004 Lexus RX 330

1 Answer

2004 Honda Pilot hot & cold


Sounds like a blend door problem under the dash.

Jun 25, 2013 | Cars & Trucks

1 Answer

The two vents on driver side of car blows hot air when air conditioning is on


I believe that your Seville has dual climate controls.So it sounds like a "Blend Door Actuator" problem. It's stuck and so it's not adjusting the mix of warm or cold air; that's how temperatures are controlled in your A/C heat system. Fault code(s) stored in the HVAC control module should be available to assist with diagnoses. AutoZone will perform a free diagnostic scan.

Jun 10, 2012 | 1998 Cadillac Seville

2 Answers

2003 Jeep Liberty. Starts out blowing cold air


it could be many things, maybe compressor heats up and shuts down, or cooling fans are cooling condensor or expansion valve is bad, a good tech will be able to diagnose this,

Mar 24, 2010 | 2003 Jeep Liberty

1 Answer

Explorer front air not blowing, rear blowing cold air


If the front is still blowing air but not air conditioned air than it is likely that a flap that controls airflow to the front has failed. The rear would still work as it is controlled by an auxiliary control.

If there is no air coming out of the front at all I would suspect a blower motor as the rear has it's own blower.

Either way a scan tool that is able to access the HVAC system is going to be the only to accurately diagnose this problem.

Jul 25, 2009 | 2000 GMC Savana

1 Answer

A/C blows warm air on left vent and cold air on right vent.


hello,good day,seems all the clarification request is all good,if all tips are done,but the problem is not corrected,send your car to a dealer,maybe one of the step motor of air flap is stuck or synchronized of all air flap is needed,they have the star diagnose to perform the job,or your recirculating pump need tobe check,ty

May 12, 2009 | 2003 Mercedes-Benz E-Class

1 Answer

Ac dont blow cold air, freon on green color


the vent from the heater is stuck in the open position causing it to close the a/c vent.

Apr 28, 2009 | 1991 Honda Accord

1 Answer

I have a 2004 Chevy Tahoe. The rear a/c stopped


This is something best done by a qualified repair shop . An yes it can have two different problems , not related ! Blower motors do go bad , or a control processor . Does it have manual or automatic HVAC . It would be to your benefit to have someone like this guy diagnose the problem . This is not for a rookie to try !
Diagnosing rear problems

Apr 18, 2017 | 2003 Chevrolet Tahoe

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