Soap and Water, an air compressor and manifold gauges are all you will need to find 95% of the leaks in an A/C system. The vehicle being used for this video is a 1995 Jeep Cherokee but the tests shown can be applied to any AC system.

Engine Performance Diagnostics

Topics discussed

symptoms

  • A/C blows warm air
  • A/C compressor does not engage

test shown

  • how to determine the cause of in-op A/C compressor
  • how to use a set of A/C manifold gauges
  • how to locate an A/C system leak with soap and water
  • how to use compressed air to find an A/C leak
  • A/C line identification

Tools used

end faq

Playlist

HVAC and Cooling systems troubleshooting

Related videos:

A/C clutch not engaging - 2005 Honda Odyssey:

How to test a blower motor and resistor (subscriber requested):

end faq


For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!

 

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