Question about 2003 Chevrolet Monte Carlo

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Air conditioner on my 2003 monte carlo 3.4 is not blowing out cold air. How do I fix this?

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Well ac r very hard diagnose the cheap way is to buy a can of freon with dye or leak detector turn on car and ac system at full blast open hood u should have to connections one with redtop one withblacktop u connect to black top make sure you shake can well the can should get cold and see what u get if it gets cold see for how long if gets hot after a couple of days you most likely have a leak. Expensive way take somewhere have them check it to check they will probaly charge anywhere from 25 to 75 to check but not fix they just will tell you what's wrong and how much it will cost shop around! They charge so much because they have to hook it up to a machine.

Posted on Jun 27, 2009


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SOURCE: In my 2003 Monte Carlo

ask a local mechanic to have a look at the causes could be numerous from a fuse to low gas and lots os sensors inbetween

Posted on Jul 30, 2011

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I have a 2003 Monte Carlo SS. The dual climate control doesn't seem to work properly. With AC going, passenger side blows cold air but the drivers side blows warm air as if it is set for "vent". I replaced...

check the actuator motor and make sure it is moving the doors between the heater and the ac. it is in the center of the heater inside the car and is a small motor attached to the heater housing.

Jun 06, 2014 | 2003 Chevrolet Monte Carlo

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2001 monte carlo 3.4 i replace water pump thermostat radiator fan assembly still overheat

it sound like you could have two problems one is you might have a bad head gasket two u could have a bunch of air in you radiator so i would start the with the radiator cap off and see what happens if its air this should take care of the problem

Nov 27, 2012 | 2001 Chevrolet Monte Carlo

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In my 2003 Monte Carlo the ac button isnt lighting up, therefore my car is not blowing cold air. How do I fix this?

ask a local mechanic to have a look at the causes could be numerous from a fuse to low gas and lots os sensors inbetween

Jul 30, 2011 | 2003 Chevrolet Monte Carlo

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Hi. my 2003 monte carlo ss is blowing cold air when I put the heater on? I did notice I need a anti freeze flush. Could this be the problem?

a system flush is a good idea this time of the year.make sure the system is full.water may not be getting to the heater core.also check heater control valve if apply.

I’m happy to help further over the phone at

Dec 02, 2010 | 2004 Chevrolet Monte Carlo

2 Answers

2003 monte carlo a/c works of and on,already put freon in twice and the security light omes on and also the traction active light comes on

Re the a/c. Get a can of red tek sealer. make sure the engine is cold or you won't get the connector on to the low side port to seal properly. Follow the insrtuctions that comes with the can. Just adding the refrigerant doesn't stop the leak

Sep 14, 2010 | 2003 Chevrolet Monte Carlo

1 Answer

Air conditioner blowing hot air on 2002 monte carlo and it has freon in it

car air conditioner blowing hot air is cause by either a leak or a clogged condenser, since it has a freon in it then it might be a case of clogged condenser but this is just a contributing factor, it is possible that the leak is small that you wont even notice that the freon is not enough for the a/c to blow cold air.

Jul 25, 2010 | 2002 Chevrolet Monte Carlo

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The heater in my 2003 Monte Carlo blows cold at the feet

one of the flaps isnt working right ,but what one?? seek local mechanic to have a look for you could be just vacumn hose perished that opens the flaps or closes it

Dec 08, 2009 | 2003 Chevrolet Monte Carlo

1 Answer

My air condition in my 2003 monte carlo, 3.8 is not blowing. It has to be manipilated and then it will start blowing or at least it did up until saturday. when it does, it blows cold. if lifted the hood...

the pipes are so cold because the blower motor is not working .. that tells you your air conditioner is otherwise ok ... i have seen two problems that cause your symptoms .. one is the blower motor is simply bad (they dont last forever) .. it is likely enclosed somewhere near the passengers knees ... it usually comes out with several screws arranged in a (maybe 6 inch) circle (sometimes in the engine compartment) .. there is an electrical plug that can be unplugged also.. .. new blower motors are usually available at auto parts stores .. another thing that can cause the same trouble .. on some cars there is a resistor block .. this is a ceramic part about 2 or 3 inches long .. it has severral wire wound resisters moiunted such that different ones can be selected by the blower speed control .. if this resistor block opens up then the blower motor quits .. you can just look at it for signs of damage.. even without the blower motor running you should be able to get cooling if you select external air (not recirculate) and drive fast enough to keep air flowing through the vents .(maybe crack a back window) . when you are stopped you have to turn off the air conditioner to avoid the icing condition you mentioned .. ps. i loved it in okc for a year ..

Jul 13, 2009 | 2003 Chevrolet Monte Carlo

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