Your 2000 Mazda 626 ac is blowing warm?

could be many things, the fuse for the a/c system should be checked first. It is located inside the vehicle, under the dash on the drivers side in the fuse box. If it is all good then it likely is a loss of a/c gas. Loss of gas can occur over time. Have the vehicle serviced. They will check for leaks, proper amount of a/c gas and proper function of the compressor. could be many things, the fuse for the a/c system should be checked first. It is located inside the vehicle, under the dash on the drivers side in the fuse box. If it is all good then it likely is a loss of a/c gas. Loss of gas can occur over time. Have the vehicle serviced. They will check for leaks, proper amount of a/c gas and proper function of the compressor.