It depends on the vehicle, some will blink like that when the refrigerant level is low.
It's telling you the revolution sensor is not matching the revolutions of the engine. The ECU takes over and cuts current to the AC when this happens and the ac light will start blinking. A turn the AC of then turn it back on and it's not blinking tells you the problem is going to lead to no AC if you don't get it fixed.
If an AC light is blinking on a 1991 Toyota Camry it may indicate that a belt is slipping. The AC light may also blink indicating that the system has been overcharged.
what cause the ac light to blink on a 1999 Toyota sienna
most have the option of using either fresh or recirculated air
AC works by pulling in d moisture and air in the room and recirculating it again and again. With this attempt the AC also pulls d moisture from our skin and makes it dry. That is why continuous exposure to AC should b avoided.
If its flickering its most likely a short
If the AC light is blinking in the Toyota 98 Sienna, it means that something is internally wrong with your AC, it has stopped working, and it is recommended that you take it to the dealer to repair. This is not a very specific answer, but that is exactly what it says in the user manual. I find if I stop, turn off the car and AC for about 15 minutes, then restart, it will work again, until a week later and I have to repeat the process.
Check vent switch to make sure it is not on windshield position
low refrigerant charge?
On the passengers side locate the a/c blower motor and then look up, you will seen the recirculating door and to the left of that you will see the actuator that controls the the inside and outside air.........
No. However, it could be harmful to yourself or passengers because you are breathing the same stale air over and over. It is best to use the recirculating mode to initially cool the car and then switch to the outside air mode to keep fresh air comming into the car.
Maximum A/C is just recirculating the air within the vehicle as opposed to bringing fresh air from the outside when it is set on normal. It will have no effect whatsoever on fuel mileage.