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Old 06-02-2008, 03:34 PM   #1
illegal2.2
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Rio Red

Default help please, ac won't work 97lgt

like title says, for the past year the ac hasn't been working. i turn to cold and press ac button but no cold air. i checked the ac level but it was full. would i need to drain and fill the ac? lmk as i don't know much about ac. thanks

choung
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Old 06-03-2008, 12:10 AM   #2
ReubenH
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AC belt broken? lol. That or maybe it needs to get re-gassed.
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Old 06-03-2008, 02:03 AM   #3
Frogsthatmoo
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Originally Posted by ReubenH View Post
AC belt broken? lol. That or maybe it needs to get re-gassed.
No, because the AC compressor works off the front serpentine belt, so no accessories would work (alternator, power steering, water pump). I would check the freon. You might be low/out. I don't know how to check the freon though. Someone smarter than I will come along soon.
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Old 06-03-2008, 02:04 AM   #4
darksc00by
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Do legacies really have serpentine belts?

I think it is the compressor.
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Old 06-03-2008, 07:18 AM   #5
ReubenH
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Quote:
Originally Posted by Frogsthatmoo View Post
No, because the AC compressor works off the front serpentine belt, so no accessories would work (alternator, power steering, water pump). I would check the freon. You might be low/out. I don't know how to check the freon though. Someone smarter than I will come along soon.
Quote:
Originally Posted by darksc00by View Post
Do legacies really have serpentine belts?

I think it is the compressor.
H6's do because of the space constraints, but your normal old EJ has a separate AC belt. Powersteering and alternator go on one, AC on the second. I broke two AC belts in a week a few months ago (first was because it was old, second was because it wasn't tightened enough, and i was stuck in traffic). Trust me, i was going round with no ac belt for a week with no issues. if i didn't know anything about car's, i wouldn't have even knows the belt had broken - which is why i suggest it in the first post :P But my money is on the compressor needing a re-gassing as mentioned.
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Old 06-03-2008, 07:21 AM   #6
Huffer
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Default

Could be anything. I hate AC systems. My HVAC unit (with the AC button) suddenly lit up last week. I have no R134a in the system though, and the system will not engage if pressure is low.

Could also be the compressor, the compressor clutch... *sigh*
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Old 06-03-2008, 07:41 AM   #7
Jonathan
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Quote:
Originally Posted by illegal2.2 View Post
Like title says, for the past year the ac hasn't been working. I turn the HVAC controls to cold and press ac button but no cold air. I checked the ac level but it was full. Would I need to drain and fill the ac? LMK as I don't know much about ac. Thanks.
I don't know much about A/C either, all I do is press the little square button with the green light and cold air comes out the vents.

Is the air coming out the vents hotter than the outside air or, roughly the same temperature ? If the car has been sitting in the sun, at first the air is going to be much hotter, but if you do this test early in the morning before it warms up, drive around some to get the engine up to temperature you should get a sense as to if the heater is somehow still stuck on and heating the vent air on you.

In your situation I would first open the hood and have an assistantant turn on the A/C... the A/C compressor is driven by some sort of (an electronically controlled ?) clutch. Check to see if it is indeed turning. You should see things slow down under the load of the compressor when the A/C is first turned on and then idle speed pick up some to compensate shortly thereafter.

Maybe for some reason the A/C isn't even engaging - blown fuse ? I think under full-throttle there is an A/C by-pass switch that might be stuck on all the time ? (these are simple things).

Other theoretical possibilities:
The A/C is engaging and working just perfectly, but the duct work in your car is still drawing air in from the heater core and not the A/C evaporator ?

Confirm that when moving the HVAC temperature control lever from RED to BLUE (to the left) that the air temperature does indeed change and in general turn cooler, or at least "less hot". Verify that what ever "flap" that is supposed to close is indeed closing. Even a properly working A/C system is not able to make the car cool down if the heater is somehow stuck on the "ON" position.

Please understand that these are just the basic things to look at, and I have no idea if checking this stuff will prove helpful or not. A decent dealership should at least be able to diagnose the problem quickly, tell you whats wrong and offer you an estimate as to how much the repair will cost you.

You can at a minimum turn the blower motor off and open the windows. This should help some as long as you are moving.
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Old 06-03-2008, 09:56 AM   #8
illegal2.2
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Default

i'll check on that. i'll update later, thanks for all inputs

chingchong
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Old 06-03-2008, 11:01 PM   #9
Kawikid20o2
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Quote:
Originally Posted by Frogsthatmoo View Post
No, because the AC compressor works off the front serpentine belt, so no accessories would work (alternator, power steering, water pump). I would check the freon. You might be low/out. I don't know how to check the freon though. Someone smarter than I will come along soon.
A/C is separate, my tensioner broke in the fall, i cut the belt and forgot about it.
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Old 06-04-2008, 10:05 PM   #10
illegal2.2
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well i checked it out today. turned on the AC button but the wheel doesn't spin? room temp comes out the vent but not cold. is the compressor bad? are all subaru 97+ have the same compressors? thanks

chingchong
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Old 06-04-2008, 10:53 PM   #11
Huffer
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2= 1998 BD + BK Legacy GT

Default

Do you have pressure in the system? If there is no pressure, the AC compressor will not engage.

I believe the compressors are interchangeable from pretty much every year...as long as the mounting points are the same.
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