The blinking light is the system's way of telling you there's a diagnostic trouble code (DTC) stored in the car's computer. To diagnose and fix the problem, you need to:
1. Get the Diagnostic Trouble Code (DTC): You'll need to access the DTC. You have a couple of options:
* OBD-II Scanner: The easiest method is using an OBD-II scanner. These are relatively inexpensive and widely available at auto parts stores. Plug it into the OBD-II port (usually under the dashboard) and it will read the code. Write down the code(s) – they're crucial for troubleshooting.
* Check the AC System Manually (More Advanced): If you don't have a scanner, you might try checking fuses, pressure in the AC system (requires gauges and knowledge), and visually inspecting the compressor clutch for engagement, but this is much harder and may require professional help.
2. Interpret the DTC: Once you have the code(s), you can look up the meaning online (many websites and forums dedicated to car repair offer DTC lookups). This will help you pinpoint the potential problem (e.g., low refrigerant, faulty sensor, compressor issue, etc.).
3. Repair the Problem: Based on the DTC, you can attempt to fix the problem yourself (if you're mechanically inclined and have the necessary tools) or take it to a qualified mechanic. Common issues include:
* Low Refrigerant: This is a common cause and often requires professional attention to recharge the system properly.
* Faulty Pressure Switch: This sensor monitors the refrigerant pressure and could be malfunctioning.
* Compressor Issues: The AC compressor itself could be failing.
* Electrical Problems: Issues with wiring, fuses, or the blower motor resistor are possibilities.
In short: There's no reset. The blinking light is a symptom of a problem that requires diagnosis and repair, not just a simple reset. Get the DTC and address the underlying issue.
