The AC system may blow warm air due to refrigerant loss caused by a leaking low pressure AC hose. These hoses commonly develop a leak at the hose crimp connection.
Problems for specific Nissan Altima years:
Car problem reports
Problem with your car? See what our experts say or submit your own.
Most reported 2000 Nissan Altima problems
The Check Engine Light may illuminate due to a defective canister vent control valve in the emissions control system.
from a cold start air conditioning works fine and will continue to work fine as long as engine is running and air conditioning stays on, drove 200 miles and air blew cold entire time. Stopped to get a drink turning off car. Engine restarted but Air conditioning compressor would not come back on. When engine completely cooled and air system stabilized air compressor came back on and air was cold again. This situation was repeated dozens of ti...