How to Diagnose Car Air Conditioner Problems

8/12/2019 How to Diagnose Car Air Conditioner Problems

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How to Diagnose Car Air Conditioner

Problems

By Kelly Reese, eHow ContributorX

Kelly Reese

Kelly Reese began writing professionally in 2009, showcasing her expertise in thefinancial and technology industries through howto articles! "he has a #aster of Business

$d%inistration degree fro% the &ni'ersity of (hoenix and a dual Bachelor of "ciencedegree in co%puter science and %athe%atics fro% )ac*son "tate &ni'ersity!

•

•

• "hare

•

• (rint this article

+earn how to properly diagnose a faulty airconditioner!

ri'ing a car, during the hot su%%er %onths, without a wor*ing air conditioner can be anunpleasant experience, to say the least! -ar% air blowing through the air conditioner isco%%only caused by a refrigerant lea*, so%e *ind of syste% bloc*age, dirt or %oisture buildup! $n auto %echanic can easily fix the bro*en air conditioner! Howe'er, for those people ad'enturous enough to fix it the%sel'es, there are se'eral steps to properlydiagnose the proble%! Ha'e a .uestion/ et an answer fro% a #echanic now1

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• -hy s #y $ir Conditioner Blowing 3ut Hot $ir/

• How to 4ix an $ir Conditioner 5hat s Blowing Hot $ir

Things You'll Need

• )u%per wire

• $ir conditioner pressure gauge

• 2 cans of refrigerant

"how #ore

Instructions

! Chec" the Compressoro 6

"tart the car and turn the air conditioner on! 3pen the hood and locate theco%pressor, which loo*s li*e a pu%p with 'al'e ste%s and two largehoses co%ing of it!

o 2

7erify that the center of the co%pressor turns! f it is not turning, 8u%p theco%pressor by hoo*ing a 8u%per wire directly to the battery! +ocate thewire leading to the electric clutch! &nplug the connector in the %iddle ofthe wire! Hoo* the 8u%per wire to the co%pressor wire and the positi'eter%inal of the car battery!

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Replace the co%pressor clutch relay if the air conditioner begins to blowcold air! f the car begins to s.ueal, the entire co%pressor %ay need to bereplaced! f the air conditioner blows war% air after 8u%ping theco%pressor, the refrigerant %ay need to be charged!

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#! Chec" the Re$rigeranto =

+ocate a hose %ar*ed as the >high pressure line> on the co%pressor!$ttach an air conditioner pressure gauge to the highpressure line! ;nsure

there no gaps by 'isually inspecting the line and gauge!

o ?

Read the gauge after one %inute! f the gauge shows green, the refrigerantis nor%al! f the gauge shows red, the coolant le'el is low! f the gaugereads high, contact a %echanic i%%ediately to assess the proble%!Re%o'e the gauge fro% the line!

o @

Refill the refrigerant, if necessary, with two cans of refrigerant! $ttach onecan to the highpressure line by fitting the hose fro% the can around thehighpressure line fro% the co%pressor! 4ollow the productspecificinstructions printed on the can to co%plete the connection process!

o A

5urn the air conditioner to >High> or >#ax!> Release the refrigerant intothe highpressure line by unscrewing the connected 'al'e on therefrigerant can! 5urn the can upside down! -hen ice begins to for%, thisindicates that the refrigerant is al%ost co%pletely transferred! "ha*e the

can and feel if there is any %ore refrigerant re%aining! -hen the can ise%pty, disconnect the hose on the can and discard both!

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Tips % &arnings

• Handle refrigerant with extre%e caution because it is toxic! -ear glo'es to protect

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How to Diagnose Car Air Conditioner Problems

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