This morning in the manual mode in AC the fan speed went up and down , in manual mode it should not do that -- is there an issue

 

Anyone experienced this

 

I have not experienced your issue, but it definitely sounds like something is wrong. Is the problem reproducible and consistent? If so, the dealer is probably your only recourse, and hopefully you are still in warranty. If it's not reproducible, the dealer's usual response is, "We can't replicate the problem."