The green light on my A / C is blinking and the air blows warm. Then after playing with the buttons and driving it blows cold again. I already replaced a leaking condenser a year ago. What could the problem be? This has happened a few times in the last couple of months.

check and make sure the radiator is full of antifreeze take off the radiator cap and top off the radiator then take your hand and cover the hole where the cap goes and squeeze the top radiator hose a few times to help it go down that way if there is a air pocket somewhere it will help push it out when you thank your done top off again and replace the cap and try

Could be a leak in air-conditioning line or compressor on its way out does it squeal at all

AC clutch is going to the dogs. Or the high pressure switch is giving it up. This is assuming AC belt is not slipping. Also check the system charge as it may need recharging.

It sounds like the radiator is low on coolant.
You could also have air pockets in the cooling system if the system is not full of liquid.

U could be run on eco a/c where the engine is using the power until it has extra to spare. Warm at start could be simlarly that there is now cold air yet and has to "make" cold air to distribute when ready. See if u can find a setting for reg use. cheers, ps eco saves dollars/euros.

You've figured out by now the blinking light means the system has a problem. You'll need to find out if the system is low on freon or if a relay or electrical part is failing. The cooling fan could also be failing to come on, which would make the high side pressure exceed the limit and shut down the system.

This is most likely a high pressure problem. If the temperature at the front of the car is abnormally warm when the compressor shuts off this is definitly the case. you may need to wash aou the condenser located in front of the radiator. The high pressure switch may be opening. Place car in shade while testing it out.
Although, it could also be the reverse. It could be the low pressure switch cutting it off. In which case you may need to add refrigerant. Now days this is simple enough as you can buy a can of refrigerant with a gauge and instructions dor the proper charge. This is a system and works together so you need the right amount not too much not too little.
Good luck, Please rate the help we give you so we can improve ...

your ac compressor is freezing up try not putting it on cold all the way. put thermostat towards the red jus a lil but still on the cold side to see if that helps

it low on feron

Since warm air eventually comes out when the vehicle is in motion, you may have an air mix door that is stuck in fresh or is somehow blocking warm air from the heater core.

To see if the air mix control motor is bad, you need to retrieve your Diagnostic trouble codes (DTC's) from the heater control panel. To run the diagnostic function, do the following:
1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirc control button to select Recirc (recirc light on.)
4. Press and hold the recirc button to select Fresh (recirc light off) and continue to hold the button down until the recirc light comes on for two seconds and then goes off.
5. If the system is okay, the recirc light stays off.
6. If there is a problem, the recirc light blinks the DTC to indicate the trouble. One blink=a problem in the air mix control motor circuit. Two blinks=problem in the mode control motor circuit
Three blinks=problem in evaporator temp sensor circuit.
7. Turn the ignition switch off to cancel the self diagnosis function. Run the diagnostic again after repairs are complete.

Note: the air mix control motor has a rod which connects to a plastic link. The link controls the mix doors and also connects to the heater control water valve via a cable. The air mix motor may check okay, but if the link is broken then you will still have problems. the motor is on the bottom of the heater unit in the front passenger's foot well.