But in most cases these clocks do not keep track of the month or year, so they will not be confused on Jan. 1, 2000. In a small percentage of these devices, the calendar may not properly recognize the arrival of 2000, requiring resetting or repair, according to the manufacturers. But even if the calendar cannot be fixed, the device should continue functioning. Carrier Corp. Even devices that keep track of time tend to be on weekly rather than annual cycles. Window-unit air conditioners also have no problem, according to Panasonic, Friedrich Air Conditioning Co., and Whirlpool.
Most vehicles manufactured in the last decade have at least one microprocessor under the hood.
A small number of older camcorder models made by companies including Sony and Panasonic will operate even if the clock used to record dates malfunctions or requires resetting, company officials said. Kodaks with a date stamp, for example, have a 25-year calendar built into their memory, a spokesman said. Cellular service providers in some cases are still debugging their networks. FAX machines manufactured during the 1990s generally will be problem-free. Older machines made by NEC and Panasonic, including some made this decade, may have clocks that malfunction or require resetting, company officials said.