A/C just quit working. No cold air.

First open the hood, start engine, have someone turn ac on. check if compressor engages.....only the outside pulley turns when not on. when the ac is engaged, both the outside and inside pulley rotate..... you will observe the 2 parts when someone turns on the ac. if no different then the compressor clutch, relay switch or wiring is bad. one can put a test light or voltmeter at the ccmpressor clutch to see if it gets power when the switch is turned on. ... if the compressor is ok then most likely ; low or no refridgerent(gaz). be aware if that's the case find/fix leak before recharging

Ok several things you need to check first ac fuses on fuse box, then thermostast, ac clutch recomend also checking the compressor to see if it is turning on hope i helped

There are few problem with the A/C cooling system better check for A/C unit fuse weather it is blown or in good condition, check for the proper working of A/C condencer unit fan motor assembly for proper working, check for weather their is no lick of gas any where in the entire A/C unit complete system or more problem better consult or take the vehicle to nearest Hyundai authorised workshop or better take it to a well knon or experiencied person who had done this sort of problematic work.