heater fuse blowing out on car?

Question

I drive a 1999 Chrysler 300m an the car ac/heat ciggaret lighter sockets as well as the lights that are around the climate control does not work. Every time I replace the fuse for the heater it will immediately blows out as soon as I turn the switch to crank up the car by the time the car cranks up its already blown.I have taken it to a few shops with no help any advice will be greatly appreciated. I also noticed that the knob to control the flow from low to high runs constantly sometimes it will stop for a few minutes but start right back up does not matter if the car is running or not I looked up that part number it is 173000 0631 "climate control" but to better explain I removed the panel for the ac/heat and noticed the part spinning at the time the keys were not in the ignition. I recently had to get car battery replaced because it kept draining I now believe that is what was running down my battery. I looked and did not notice any exposed or burned wires.

! · Accepted Answer

You do understand that the only way to solve it is to locate the short that makes the fuse blow.
If it's an electronic-type control uniot (dials, displays etc.), it may be caused by an internal failure, although it is unusual that it draws the short-circuit kind of current. So I'd double-check for an old style short (using a proper tester). Isolating the control unit somehow might help, although it may not be easy or straightforward, but it may indicate if the CU IS the culprit or not.
There's probably the only alternative: replace the control unit - this may be rather expensive, unless you find it in a salvage yard.
I don't think anything is supposed to spin with all systems off, so check what exactly makes it spin - that may also be part of your problem.
It's hard to provide useful advice at web distance.

squigmyster · Answer

just a thought look inside cigar lighter.

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heater fuse blowing out on car?

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