See related link. It could be any number of things, you need to run some tests. Could be as simple as a blown fuse. Low pressure is probably most common. You may or may not have a leak that needs fixed (could be caused by a worn o-ring / gasket). Worst case you need a new compressor. You can buy a cheap gauge from harbor freight or take it to a professional.
I just replaced the freon in my air-conditioner but it still blows warm in my 02 toyota echco ...Is there a possible problem somehere?
An air conditioner blows out heat
Did it just start doing it and never goes back to cold air, or does it do it intermittently? Several possible causes: (a) The a/c system has lost its charge of coolant gas. (b) the vacuum system that control the opening and closing of the 'doors' in the system that direct cool air to the pasenger compartment has a leak and the 'doors' do not stay in adjustment during the A/C cycle.
Possibly a low refrigerant charge
If your air conditioner blows air but it's not cold air then you probably need freon in your air conditioner
The Air Conditioner is on
Well the main reason why your car blows out cold then hot is because the air conditioner may not be working properly. You should go to the car shop and get it fixed.
the system is probably out of coolant.
If the trasmission of your Toyota RAV-4 blows up, it is best to take it to a qualified technician such as Car-X. They will diagnose the exact problem and quote you a price to fix it.
It could be a loose wire or a bad relay switch worse case the blower motor is going out
monica
If the ambient (air) temperature rises and the A/C blows warm air, it probably means that you need to add freon.