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.
AT&T Customer Service Phone Numbers. Residential: 1-800-308-4156 Products & Services. 1-800-244-4444 General Assistance (Billing) 1-800-621-4533 Bilingual (Spanish) 1-800-611-4466 Repair.