2007 caravan heater blower select

[exalteduser]

the switch for fan speed has 5 positions.

off, low, low/med, med/high, and high. 2 days ago all of a sudden they all work except high. i try to see if knob is loose or changing other settings to no avail.

all i can find on this matter is the opposite where high is the only one that works so that doesnt help. really dont feel like thaking this to a shop.

Please help, and ty.

2007 caravan sxt

[RIP]

I take it you wouldn't be here if your warranty was active. If you have the automatic temperature control version of the climate control system I would suspect either the switch or the front blower module up behind the glovebox. If it's the manual version I would again consider the switch or the resistor block. Not sure on an 07 but on ther model years it's behind the glovebox and can be accessed from the engine compartment.

[hundahunta]

yup resistor

[exalteduser]

apparently all i have left is emmisions warranty and a few random items covered. it is the manual one, not the digital auto one.

Is this a part i can get from the local autozone/ o'riellys?

[RIP]

Yes, they have them for around $20.

You may be better off using a multimeter to troubleshoot this if you have one and know how to use it. After looking at a schematic I have some doubt if the resistor block is the culprit. I'm not saying it can't be. Many times schematics are wrong or don't show everything in the circuit.

The resistor block is a series of resistors. The low speed fan position power runs through all 4 resistors in the block. As you increase the speed, fewer resistors are used. When you get to the high speed position a single resistor is used. What is giving me doubt is ALL fan speed positions also use this "high speed" resistor. That makes me think if the "high speed" resistor was toast, the blower wouldn't work on any speed.

You may be able to find the problem visually. Remove the connector from the resistor block and look at contact #2. This is the high speed input from the switch. It may be corroded/burnt/pushed. Many times these connectors melt and create an open in the circuit. Should see a dark blue wire with a grey stripe connected to contact #2. If you can, check for the 12vdc input from the switch with power on and the fan speed switch on high. If it's not there the problem is either the switch or that wire.

This thread is loaded with info on the subject including pictures: http://www.automotiveforums.com/vbul...d.php?t=340871

[exalteduser]

Holy cow thanks for the detailed reply, even if it took me 8 months to see it! Don't know why I never came back here to check. onward...

http://www.autozone.com/autozone/cat...hText=resistor

I assume this is the part described above, I would like to get this done before winter time comes back, maybe thats why I havent bothered with it in 8 months! I will likely just buy a manual to do this job, as I only ever work on old cars and Im not really familiar with doing anything to something this new.

[exalteduser]

yep that fixed it. (resistor)
Also its really easy to get at in the 2007. lower glovebox, dont even have to remove. unplug the 2 plugs and unscrew 2 screws, its right there!