Mechanics

WHEN I UES AC ,THE ALTERNATOR WILL FAIL WHY?,THE AC COOLING IS VERY LOW

1999 Fiat Uno • 20 miles

My uno is 1999 model, 1.7 ltr diesel engine, 5 speed manual gear box, 5 door sedan class, new 70 ah amaron battery.
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Kingmakensn
May 28, 2012.



Our database does not have any information on your vehicle so I do not know the exact design employed and what I have to say might not apply.

Check the crank pulley to see if it is equipped with harmonic damper. If yes, you could have a bad damper allowing the pulley to slip.

If AC and alternator shares the same serpentine belt, check the belt tension.

If everything test fine, have the alternator tested. It could be failing.

When AC is turned on, ensure the idling speed is correct and not too low.

KHLow2008
May 28, 2012.
When the AC magnetic clutch kicks in, it puts an additional load in the electrical system this is where an AC idle-up solenoid is used to increase the idle to maintain the electrical load as demanded by the magnetic clutch

Rasmataz
May 28, 2012.
What information are you need?

Tiny
Kingmakensn
May 28, 2012.