Question about 1997 Chevrolet Monte Carlo

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Air cond. if the compressor is not working on my 1997 dodge caravan, will I not be able to charge the system with freon? I know there's a leak somewhere, but it's such an old vehicle, I don't want to invest a lot of money into it. also: should the compressor cycle as freon is being put into system? thanx.

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  • dark71811 May 24, 2009

    thank you so much for responding so quickly! i had a friend come over to try to put freon in my van, but it wasn't going least we didn't think it was. we had no gauges to use. it was a can of freon plus stop leak. i had the van running w/the a/c on, but it wasn't blowing out cold air after a few minutes. we wern't exactly sure where the port was..we thought the upper one cuz it had a quick connect on it. there was a lower one, but i think that said something about the evaporator. i've had the compressor replaced twice & last summer when i had a garage recharge it, the guy said my evap may be going bad & i know it's a lot of labor to replace that! behind the glove box!! i just keep putting in freon every summer cuz it's cheaper & it has lasted all summer before. so, i hope i clarified better for you & thanx again!!

  • dark71811 May 25, 2009

    this is for csmock132 cuz he helped me before with this issue. i was driving last night & needed to use the defrost cuz it was humid out & the compressor was making a "race car" sound as i accelerated. this has happened before i think when the compressor went bad. is this the reason why it made that sound & also why the freon wasn't being sucked in when attempting to charge the system? thank you in advance for your help! also: i don't know how i got linked to being the owner of a 1997 chevy monte carlo...i have a 1997 dodge caravan! ooops.

  • Mike Butler
    Mike Butler May 11, 2010

    Once freon has reached an acceptable level, yes compressor should kick in, That's provided all switches are still good. Have you thought of trying sealant on A/C? Have had some success with it, as long as leak isn't too big.



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Typically the AC system will protect the compressor when the system has low pressure, no R134. If you have the correct tools you can test the pressure by attaching a gauge to the low pressure side of the system. Anything below 10 psi will typically not allow the compressor to engage. The other tool you will need in addition to a gauge, or some quick connect hoses used to install freon also has a gauge. Any way a low system can be purged and should be prior to charging. It is a requirement of repair shops to purge the old freon into a system or container, however, I dont have one and the small amount being purged wont hurt. Step 1 purge the system, open the valve on the hose, it will stop hissing, this should be done with the car off. Step 2 close the valve on your hose and start the engine, turn on the AC to max with fan on high. Screw a can of R134 on the valve on the end of the hose and turn the valve to open the can, shake the can for a few seconds and open the valve slowly, you will feel the can getting cold, turn the can up side down and open the valve completly. If you havve a healty AC system and compressor it should turn on at some point during the emptying of the 1st can. The air should begin to blow cold. Check your pressure before using another can. If you think you have a leak get R134 with leak detector. Dont go over 45-55 PSI.

Posted on Jun 04, 2009

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When you start putting the freon in the compressor should kick on and then start pulling it in. Yes it will cycle, as long as all the lights aren't flashing on the temp control.

Posted on May 24, 2009


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