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Old Aug 2, 2007 | 09:59 PM
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Default A/C problema
my A/C just stop working and tried to re-fill , but it won't suck in the refrigerant.1997 firebird V6
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Old Aug 3, 2007 | 12:40 AM
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What makes you think it is low on freon? Does the clutch engage?
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Old Aug 3, 2007 | 09:17 AM
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Do the vents not blow cold? How about the top dash vents, do they work? Or is it just the floor vents? It could be that PITA little plastic thing that always goes bad. Check for vacuum leaks, since the AC is vacuum controlled.
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Old Aug 3, 2007 | 01:54 PM
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get someone to put a gauge on it and post up your high and low side readings.
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Old Aug 3, 2007 | 02:07 PM
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it just blows hot air , all the vents is ok and no it does't engage , going to check the presure and see
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Old Aug 3, 2007 | 10:55 PM
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If the compressor clutch is not engaging, then it could be a dozen different things causing that, low side switch, high side switch, relay, fuse, the clutch coil itself, etc. etc..
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Old Aug 3, 2007 | 11:13 PM
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it will engage if i place a jump wire , there a swich for both low and high presure , i didn't know that, where the high presure switch
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Old Aug 3, 2007 | 11:16 PM
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High pressure switch is usually on the compressor itself. Try just jumping the low pressure switch at the connector with a fused test lead and see if the compressor doesn't come on.
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Old Aug 5, 2007 | 10:25 PM
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how to test presure switch if they are good or bad
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Old Aug 6, 2007 | 12:07 AM
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Originally Posted by ricardo colon
how to test presure switch if they are good or bad
Unplug the connector and jump the two terminals (connector side, not the switch) with a wire, hell a paper clip will even work in a pinch.
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Old Aug 6, 2007 | 12:52 AM
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that would only engage the cluch , i want to know if the switch itself is bad or not
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Old Aug 6, 2007 | 12:54 AM
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that would engage the cluch , but how do i know if the switch itself is bad
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Old Aug 8, 2007 | 06:29 PM
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TIC TAC TIC TAC ANYBODY HOME
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Old Aug 8, 2007 | 07:20 PM
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Originally Posted by ricardo colon
that would engage the cluch , but how do i know if the switch itself is bad
If the clutch engages, then you know that much of the system is working. To test the switch, unscrew it from the accumulator and measure resistance across the two terminals. If you have good continuity ( 1-2 ohms) then you know the switch contacts are closed and the switch is probably okay. Then try plugging the switch back in while it is still in your hand, the compressor should engage just like when you used a jumper wire. If it does not, try a new switch and see what happens.
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Old Aug 9, 2007 | 12:31 PM
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Originally Posted by ricardo colon
TIC TAC TIC TAC ANYBODY HOME

Go to a parts store buy the a/c refill with a gauge. $30 get us a pressure reading

TIC TAC TIC TAC you there



Some people man gee wizz my a/c no work but I want to add freon with out checking the pressure. Then I expect the internet to come up with a magical diagnosis for me with out giving them proper info.
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Old Aug 9, 2007 | 12:32 PM
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Originally Posted by ricardo colon
that would engage the cluch , but how do i know if the switch itself is bad
Tic tac tic tac depends on the pressure
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Old Aug 9, 2007 | 12:35 PM
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Originally Posted by ricardo colon
that would only engage the cluch , i want to know if the switch itself is bad or not
Well since you refuse to tell us the pressures then I will tell you how to make it take a charge. Hook up to the low side, open your valve keeping can upright you do not want to do a liquid charge, sometimes I will hold the can upside down for 1 sec or so with really stubborn systems. Jumper your switch and it will suck the refrigerant in. When the system shoots out a lot of refrigerant thats when you know you have popped the higher pressure release.
Last edited by shotty128; Aug 9, 2007 at 12:44 PM.
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Old Aug 9, 2007 | 06:32 PM
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ok i.ll work on that tommorow
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