It depends on the size of can you purchase . According to Ford specs in your van holds 56 Oz total if you have front and rear AC units
Look for the sticker under the hood! It will tell you the refrigerant and the ounces.
Probably 2
134a refrigerant has been the standard for over 10 years.
R134
A 1998 Ford Windstar would use refrigerant 134a
How many cans of Freon does it take to charge a 2004 F150 Ford pick up Truck?
where is air flow relay on 2000 ford windstar
R-134A
where is the tcm in a windstar 2000 located
According to the 2000 Ford Windstar Owner Guide ( 5W-30 )
Which do i hook to to charge the freon in a 2004 ford expedition
In the cargo area , on the passenger side , behind the service panel ( on a 2000 Ford Windstar )