Expert: Chris Fortunato - 4/9/2007

Question
I've heard different things for this problem. I've heard that it could be something with the computer in the vehicle and I've heard that I need to replace the hole blower it self.

What do you think is it something else?

Answer
Storm,

I'm gonna copy the text from one I just wrote on this same thing--

"Most times, the repair for this situation is not in the control head assembly. You can test for voltage down at the blower resistor block (directed from the fan control switch), that normally resides next to the blower motor, underneath the right hand side of the dash. You can locate it by looking under the dash for the blower motor while it's running. The resistor block is usually right next to it -- the connector has anywhere from 4-6 wires in it. You could measure voltage at each wire, and manipulate the control switch to make sure each wire gets voltage when it should.

You can also measure resistance across the resistors in block itself. Depending on the system, the readings will be between .4 and 2.3 ohms. You can even take it out and inspect it for obvious failure. Regardless, this is a relatively inexpensive part (unless it's a blower module -- for automatic A/C systems), often under $35. Good luck!"

Your situation is the same -- high blower only. Most times, it's the Resistor Block for manual systems, and the Blower Module for automatic A/C systems. Good Luck!