A/C Switch Indicator Blinking

NOTE: Testing procedure for this symptom was only available for Camry 4-cylinder CNG, Camry 4-cylinder gasoline and Camry Solara 4-cylinder models.

Check A/C compressor lock sensor circuit. See A/C COMPRESSOR LOCK SENSOR CIRCUIT under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
Check A/C evaporator temperature sensor circuit. See A/C EVAPORATOR TEMPERATURE SENSOR CIRCUIT under COMPUTERIZED ENGINE CONTROLS in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.