Hi Thelma, If possible, If you have the old unit get the details off the body of the alternator then contact them, In your case I do not think you will get anywhere with Car Craft only Crp answers, as said these units normally give an indication of discharging, did you find the battery going flat in this cold weather? did you see a faint red light on your Instrument panel ( Dashboard) if so that was your warning. as said by jg this is not a part of the service BUT they should have checked the quality of the Auxiliary belts Eg/cracks. but as said the unit should have lasted longer than that, do not back down with the both, Car Craft + Fords. Good Luck.