My blower motor will cut out without warning on my 97 Blazer and then just start up again on it own. It usually will only pause for a second or so then it restarts. I have replaced it once but am starting to get some noise from it occasionally that indicates it may need another in the not to distant future but I am thinking this is a seperate issue, any ideas???? I have replaced the heater/ac control head and it made no difference, thanks again

 

Your motor is going bad, may as well plan on replacing it. When you get ready to do it post for information, you need to cut it out of the housing, not a big deal if you approach it correctly.