Just recently my vehicle stopped blowing hot air from the vents. now it only blows warm air at the highest setting and then only for a very short time. What could be the cause?
The blower fan resistor pack appears to be bad. It's function is to reduce voltage to the blower fan when the lower speed settings are selected (HIGH being the only speed that will still work). Changing the pack is fairly easy, you can get access to the blower fan and resistor pack through the glove box opening. A new pack should run you around $30. see http://repairpal.com/ac-blower-inop-due-to-failed-resistor-524
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