2004 Ford Focus, 2.3 Liter Engine, 49,000 Miles, Automatic. A/C Troubles. While driving this car the last few days in Minnesota (temps 100 - 105 degrees and 70-88 humidity in the air) The A/C only seems to work well while driving forward above 30-40 mph hour. When stopped at stop lights the temperature of the air being pushed through the vents changes dramatically warmer, then I hear a hissing sort of sound and it seems to get slightly colder (this cycle continues while the car is stopped at stop lights) but the air temp difference coming out of the vent changes dramatically. Also when I hear the hissing sound before the air gets slightly colder the engine RPM's chuck down one indicator on the tack and you hear the engine slightly struggle down, then the hissing sound goes away and engine RPM return to normal idle (slightly below the 1 indicator on the tack). - Is this the A/C clutch kicking in and out? - While driving forward on the freeway and city roads with little stop lights it seems to work fine and continues to push out cool air, then gets pretty cold. But when stopped at the lights the cycle starts over again. I know its a smaller motor than my Chevy truck with a V-8, but there also seems to be little water dripping from the car while or after the A/C runs.
I never had a car do this and something seems wrong - Any thoughts or suggestions would be appreciated to get me started on a diagnosis, before I go pay big bucks to get it checked out or fixed at the mechanic shops.
Thank You !
have the same problem?
Friday, July 1st, 2011 AT 10:08 PM