heater motor only working when it wants to

i have a 1995 chevy blazer. my heater motor comes on only when it wants to.it could be alright for a few days then it wont come on.if i leave it on for awhile it will somes come...or it will work alittle when it is on full blast.can i please have some feedback on this

Hello;
Your heater motor is on its way to the graveyard.When it dont work, tap on the fan housing.located under the hood on the right side,on the firewall. if it kicks in. its dying. you can get a good one from Advance Auto.They have a lifetime warrenty on them. Thier easy to replace, about 5 screws.I just replaced my friends fan last night, he has a 93 Blazer. They cost around $20 . my friends heater fan was doing the same exact same thing. it worked then it didnt. Like i said earlier, when it isnt working with the switch on, go and pop the hood and tap on the fan housing, if it kicks on, then your fan is faulty. try it and let us know

Don

Thanks CandyWrapper,,, I had the same problem with my 1992 S10 Blazer and now it's working,,, and it was cheap too $21 at Advance Auto