air conditioning not working

1997 MITSUBISHI MIRAGE
131,000 MILES • 4 CYL • 2WD • AUTOMATIC
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KEN PHILLIPS
  • MEMBER
  • 2 POSTS
the ac unit cools good when the ac compressor is on byt it wont stay on , runs 3 seconds and cycles off. Help.thanks,ken
Apr 16, 2010 at 7:26 PM
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Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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MERLIN2021
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 17,250 POSTS
Needs a recharge...or low pressure cycling switch here is a video to help you recharge the system

https://youtu.be/uZrQCGwXfek

Please run down this guide and report back.
Apr 16, 2010 at 7:50 PM
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KEN PHILLIPS
  • MEMBER
  • 2 POSTS
where is it located? thanks
May 20, 2010 at 2:40 PM
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MERLIN2021
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 17,250 POSTS
DUAL-PRESSURE SWITCH 1. With engine off, disconnect pressure switch connector (located on receiver-drier). Connect a jumper wire across high/low pressure side of harness connector. See Fig. 4 . Install manifold gauge set to high pressure side service valve of refrigerant line. 2. Start engine and adjust engine speed to 1000 RPM with A/C clutch engaged. Turn blower switch on. Engine should be warm and doors and windows closed. 3. Check for continuity at pressure switch terminals with manifold gauges at specified pressure. See PRESSURE SWITCH SPECIFICATIONS table. Condition is normal if there is continuity between the terminals. If there is no continuity, replace switch.


https://images.2carpros.com/forum/automotive_pictures/62217_Dual_Pressure_switch_AC_1.jpg


https://images.2carpros.com/forum/automotive_pictures/62217_switch_specs_1.jpg

May 23, 2010 at 8:42 AM
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DON SAMSONITE
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  • 1 POST
I had this problem and had to get a new cycling switch cost me $56.00 I love this site
Jul 5, 2019 at 7:30 PM
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VITTELLI
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  • 2 POSTS
I just bought a 95 mitsubishi mirage with 95000 miles on it. it runs great but when i turn on the AC it blows warm air. Is there a way to recharge it easily or would i have to have it done at a shop?
Jul 7, 2019 at 1:04 PM (Merged)
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LEGITIMATE007
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 5,121 POSTS
if your vehicle has already been retrofitted, to 134a which I think it has, then yes, its very easy, get yourself a big can with the meter on it, and follow the directions, its that simple, do not be intimidated
Jul 7, 2019 at 1:04 PM (Merged)