Need to change dashboard blower

Hello, noise that occurs when changing from hot to cold or cold hot is not indicative of a blower motor problem. The blower motor would only be affected by the change of speeds from low to high or to off. Even then, noise may or may not be related to a blower motor concern. I would have your ventilation system checked along with the door mechanisms that change the air flow from hot to cold and back again. Sounds like there is some kind of concern there. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops