A standard cooling fan is essentially a bladed DC motor. By varying the voltage input across the acceptable range for a fan, the speed of the fan will increase (to added voltage) and decrease (to reduced voltage); a faster fan means more air moved and thus a higher heat exchange rate.
Contact them toll-free from a Vodacom cellphone by dialing 111. Contact them toll-free from a Telkom phone by dialing 0800-111-234. Note: Telkom toll-free numbers are generally NOT toll-free when dialed from a MTN/Vodacom cellphone.
Whatever the issue is, making a phone call to contact Vodafone customer services is without a doubt the most efficient way to obtain instant answers and solutions to the problem you are facing with regards to your service or device. You can call the Vodafone contact number for support 7 days a week.