Have you checked the FUSE of the fan motor? go check it first then if ok have it replaced asap. May effect din yan coz usually yun radiator nun aircon is infront nun engine radiator, what these fans do is push air inside the engine while yun Fan Blade of the Eng pulls the air naman. If the auxillary fan is not working and your car is not running, nahihirapan yun engine mo to pull air from the front since nakaharang yun radiator nung aircon. Tama din si IAN, sometimes yun Thermostat sa engine is stucked up so the water isn't going around the block & cyl head. Engines from japan kse standard ang thermostat coz cold country sila. We sometimes remove these from the engine esp when diesel.

What's the year model of your car ba?