Two problems related to air conditioner have been reported for the 2003 Nissan Frontier. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Nissan Frontier based on all problems reported for the 2003 Frontier.
Air conditioner compressor and lines broke.
Air conditioner a/c works properly until the defroster is engaged. Once the defroster is turned on the ac remains on until the engine is turned off. There is no other way to shut it off.