I have a 2005 elantra. The defrost/heater fan has stopped working. It happened last winter. but it started working again in march. Just last week it stopped working again. Sometime if i slam my passanger door it will run for a while but then stop. when it does work it sounds rough but like i said last winter it did the same thing and the fan started working on its own in march and has run like a top since. I would appreciate any help with this. I am somewhat mechanically challanged so laymans terms would be appreciated.

thanks in advance

 

You probably just have a bad connection.