Originally Posted by Cartaphilus
I own a 2005 Santa Fe with approxiamtely 77,000 miles on it. I just had to put my third blower motor switch in it. That means this switch is failing on an average of every 26,000 miles if you do the math (actually, the last switch failed in only 16,000 miles).
Is anyone else having a similar problem and fall-out rate? It seems this switch is failing _way_ too often.
I've got the exact same problem, except I think I'm on switch #10 or #11. Last one lasted less than a week. The switch always seems to fail when I shut off/re-start the car...works before I shut it off, then doesn't work when I start the car again. It's always the high speed that fails first, and then the whole switch fails. I don't know if it fails when the car is shut off or when it's re-started.
While it could be a short, I've concluded that the switch is just horribly under-rated, or that some vehicles have blower motors with excessively high current draws. Out of some level of desperation, I just changed the blower motor (not a fun job). If I pop another switch, I'm either going to try a power diode across the motor (to shunt the inductive kick when the power is shut off) or a power resistor in series with the high power wire. If neither of those work, then the car might slip out of gear on a steep hill.
It's out of warranty, so I'm changing the switch myself. NAPA or rockauto.com have reasonably ($20-30) priced switches. I've not seen any difference in the switches from Hyundai, NAPA, or rockauto. In fact, they all seem to be identical.
Changing them is relatively easy. Only requires a Phillips screwdriver. Take out the ashtray, remove the two screws that are behind the ashtray door, and pop the lower half of the panel out (its held in by snap connectors).
There are three connectors: one at the bottom for the lighter/power connectors, and two by the Heater/AC control section. Disconnect all three and the panel is free. There is one screw that holds the switch in place, and then it turns out (the trick is there is a "lock" at the bottom of the switch that stops it from rotating...depress that, and it turns right out). The front knob and center bezel come out when you pull the switch body out. Reverse the process to replace the switch.