Question about 2002 Mitsubishi Montero Sport

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Why does my A/c compressor have a slight squeak and spins intermittely? Do I have to replace the compressor

Sometimes the a/c works fine for a little while and sometimes it spins intermittently and will not produce cold air. I've added a little refrigerant but nothing has changed and the pressure gauge is still in the red zone? Can I fix this problem without replacing the compressor

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  • Mitsubishi Master
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Is it belt driven ? check the condition/tightness etc of the belt

Posted on May 15, 2014

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Red meaning too high or too low? ( assume you are only reading the low/suction side?)

Too low means it is either undercharged or there is moisture in the system. Intermittency would lead me to suspect the latter. What happens is the moisture freezes while the system is getting cold, clogging the expansion valve. Once clogged it doesn't get cold anymore, the clog thaws and the cycle repeats. The correct way to fix moisture contamination is to evacuate the system and replace the charge. You can sometimes get away with dumping the charge, replacing the drier, purging and then recharging, but it's an expensive gamble, and it's not very eco-friendly.

Too high means it is either a failed thermostatic expansion valve, overcharge or bad compressor. In the first 2 cases you'll typically see some icing of the suction line at the compressor. (It's easier to troubleshoot when reading both the high and low sides.)

Posted on May 15, 2014

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SOURCE: changed out thermostat on 02 mitshibu montero

check the lower radiator hose it may be collapsing at high engine speed

Posted on Jun 24, 2009

melvi_99
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SOURCE: 2000 Mitsubishi Spyder ac replay intermittent trouble

two things you may try, relocate ambient sensor to colder place, remove it from front bumper, and connect the two wires on refregerant temp sensor located @ rear of compressor, be carefull and observe your a/c system after doing this

Posted on Jun 21, 2010

mc1bean
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SOURCE: My AC is blowing cold

Hello,

I read your situation, and this kind of happened to me, which is similar which is what your going through. Let me explain and maybe this will help. I have myself a 1993 BMW, My ac was blowing real weak and blowing only out warm air, so of course i first checked the compressor, and it was triggering on, and checked my high speed fan, ( that is the fan that goes into high gear based on thermostat based on heat of motor) all this seemed to be fine, so i went down to mechanical shop, and for them to check my ac system was 85 bucks, and we would go from there, if needs just a charge, or something else wrong, then price would certainly go up. So, what i did to save some money and take a chance, was I went down to AUTO ZONE, and bought the freon kit that comes with pressure guage and, then went home and hooked up, followed instructions completely, (you know, weather temp, where to turn dial, can at 2 o'clock position, and shake every few minutes) Now, after I did this, it was cooler and did make a difference, but it was like yours certain rpms, better and real intermittently working. Now, I realize your car is different then mine, but same symptoms and here is what I did to fix it, and it works great today....

Fist make sure your fans are operating proper, at high temperature they should kick on higher speed which of course keeps engine cooler as needed. Make sure that compressor of course is coming on as needed, by hearing it kick on, it will of course lower rpms some, assuming all that is working proper, here is what i did and i will explain why.

My car, after charging it, and it was real low when i started, i believe got a vapor lock in it, meaning, when i got all done, it seemed to be charged and full and all that, but just didn't work good enough, so i drove it a couple days with ac on high, maxed out, and then bought another can an recharged it again, and shazam!! it took more, and apparently got the partial air bubble, vapor lock out, and now ac works good, and blows cold with no intermittent symptoms.

Bottom line to this story, is if you are sure other items are working proper, it might be recharge it again, and next step to see if there is a air leak in line, that would cause this as allows air to get in and cause vapor lock. A service center can put whole system under pressure to see if there is a leak somewhere, if recharging it does not solve the problem. Thanks Mike no punt intended, but be Cool!!

Posted on Aug 26, 2011

cortesbige
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SOURCE: Are there switches on the brake or gear shifter that would prevent a 2000 Eclipse RS 4 cyl from starting? Problem occurs intermittently.

could be the shifter when its not engaged in park all the way it prevents it from starting

Posted on Feb 19, 2013

  • 5 Answers

SOURCE: 2004 mitsubishi endeavor fan blower works intermittently

It sounds like your blower thermostat is working intermittently.

Posted on Mar 14, 2013

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2006 chevy impala, squeaking (like tennis shoes scuffing clean floor or the noise basketball players make when playing ball on the court)/tearing noise driving slow and making turns. Help.plz. no.idea what...


Worn brak pads signal their wear by allowing a little metgal scraper to contact the metal brake rotor when brakes are applied. It's their way to signal the driver that the brake pads are worn down.

If the brakes have been worked on recently, the technician may have slightly bent the metal brake rotor shield ) inward enough so that it can intermittently contact the spinning brake rotor. That makes a squealing sound sometimes or all the time, depending on how much it was bent. Poke it with a long scrfewdriver to bend it away form the rotor (just a little is all that is needed.)

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When you put Freon in, there should be oil in the freon also. Usually says it on the bottles. Make sure it is not the belt making chirp sounds either. Loose belt can make them chirps or squeaks.

These rarely go out, you can find them all over the wrecking yards also if you need one.

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If the belts are good the noise could just be the a/c compressor making noise. The compressor is the only thing that is not normally spinning until the a/c is activated and the a/c is activated by the defrost to dry the air. Cheapest thing to test is the belt I would replace the belt and if it is not the belt you can try the compressor. If it is the compressor then you have a extra belt to put on later.

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