heat blowing cold after changing serpentine belt & idle/tension pulley part

Asked by Danielle Mar 19, 2018 at 01:56 AM about the 2004 Jeep Grand Cherokee Limited 4WD

Question type: Maintenance & Repair

I lost heat, then power steering. I realized the
serpentine belt had come off. I replaced with a new
one but nothing seemed wrong with the old one.
Then i replaced the tension/idle pulley part. It ran
fine for a few miles then started running a little on
the hot side & when fan kicked on it was
obnoxiously loud. Had heat & it went back to
blowing cold air.

1 Answer
103,425

KenF answered 6 years ago

From your description it sounds as though the belt still is not operating as it should - either the tensioner is not keeping tension or belt is wrong size or there's a stuck pulley. That's assuming there isn't another unrelated mechanical breakdown.

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