Heater control not working properly

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hatda02

9/3/2007 5:56:27 AM

Sometime last year my heater speed control stopped working. 0 for off of course still works fine. 1,2,3 speed setting does nothing. 4 for max works fine. I was told by a few people the heater control unit right below the radio has the resistor in it and replacing this should fix the problem. I picked up a used one and still have the same problem. Of course the used one could be bad (it was a low milage car), but I'm not so sure.

If I put my ear down in the passenger side foot area and turn the heater control to 1, I can hear the blower unit make a 'click' like it is getting a signal.

Any ideas on what I could test for? I'm at the point where I think it could be the blower motor.

Thanks ahead of time!
Dave

Doohickie

9/3/2007 4:35:02 PM

I'm guessing it's the Blower Resistor, but it sounds like you already tried that. The connector for it is labeled "I24" in this picture:

For reference here are the schematics out of the Hyundai service manual:

hatda02

9/3/2007 5:48:37 PM

Well.....it looks like I was told the wrong part by a couple people including the Hyundai dealer. The part I replaced was what they call the blower switch in the first pic from the SM. They told me the resistor was part of this unit.

At least I know what I need now. Thanks. I'll update after I get it installed.

hatda02

9/8/2007 12:44:13 PM

I got the part today as pictured above (I24). This fixed the problem. The part number I picked up was 97035-3D000 and was about 45 dollars.

I wish I would have looked at the old part first. It looks like just the solder connection popped off. Oh well. It's fixed either way.

Thanks again for your help.