Hi to all, my daughter's car is a 2020 Chevy spark/auto with 6800 miles on it. It's had an issue for the past 2 months when she is driving to work 20 plus miles or even going on a small drive with the AC on it the fan slowly fades out to just ice-cold vents.  Went to the dealer Reedman/ Toll in Langhorne PA. since it is still under warranty until 09/20/23. thought it would a cake walk since it's all over you tube throughout the Sparks production on trouble shooting Resistor/Fan.  So went to the dealer the first time down for 4 days they told me that AC was slightly over charged they brought into spec and told me on the notes that issues with fan/ resistor is a safety protocol if the resistor get too hot is shuts down and it normal. Daughter picked up car and went to work and whooop there is same issue.  I called the dealer called BS they said bring it back in where it is right now been down for 9 days if you count Sat and Sun. I just had a heated conversation with the service writer questioning the skills of her alleged 20-year A+ Technician. I was told that they ran a diagnostic and No codes / No Check engine light there is nothing wrong. Of course, no codes it's a gradual issue and I do not believe her car is even sophisticated enough to pick up this issue on a diagnostics and parts do wear out. Other than removing the resistor and putting on a bench which i know they haven't done.  The consensus on YT is that if all other trouble shooting is done and is the resistor that they recommend both resistor/Fan motor parts be changed in tandem.  This is an easy repair and there is easy access to both parts on passenger side.  what are your thoughts. PS i know my first mistake was taking to the dealership.