98 626 Squealing during defrost! Help!

[mosaicmomma]

1998 Mazda 626- squeals intensely. Had 2 belts replaced..now every time I start it it still squeals...tried belt dressing...it ceases temporarilly but when I turn on the rear defroster and/or front defrost (not vents though) IT SCREAMS!! it is driving me nuts...any advice/help would be appreciated!

 

[Makenee]

Dear Mosaicmomma,
I had a similar problem on my 2002 mazda 626.I replaced the belts on my car and was fine for about 3-4 days.Then I kept having the problem you are having.My car would squeal VERY LOUD after I would turn on the a/c or defrost.I took to my mechanic and he loosened the alternator and power steering pulley bolts and tightened the belts by pulling on the pulleys with a big prybar and then tightening the bolts.He made sure not to OVERTIGHTEN them though.You should have about 1/4 inch to 1/2 inch play on the belts and that is all.Anything else is considered loose.I haven't had the car squeal since.Sounds like that might be your problem.Anyway,hopes this helps.Keep me posted when you find out what the problem is.