I have a 2006 durango. The A/C stops working periodically however when I jiggle the Blower motor resitor or the connectiong wires, the A/C comes on again. Sometimes I'll have to do this all day long and some days I wont have any issues with the A/C at all. Does somthing need replacing or tightening????
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There may be too much draw coming from the blower motor itself. I'd had the same issue when my blower started going bad. The resistor replacement would work for a day or so, but then it would go bad. The motor is a relatively easy thing to replace ($50 @ buy.com) and only requires the removal of 3 screws and the disconnection of a wiring harness.
A bad blower moter resistor can cause the blower to default to high speed only. The resistor is
located behind the lower right side of the dash on the heater box just left of the blower moter.
The fan switch can also cause this problem, but more often then not it's a bad resistor.
Hope this helps.
There are two things I can think of that may be causing your problem. First the blower switch in the dash may be bad if you do not have an electronically controlled blower, if you do it could be the control unit itself, but usually they stop working alltogether. The other part which may be bad is the resistor pack on your blower motor.
If your blower has four speeds on it like most blowers these days then this resistor pack will have four resitors mounted on it. They look like coiled wires. These resistors vary the voltage coming from the blower switch so you have different blower speeds. Kinda acts like a filter dropping the voltage for the lowest blower speeds incrementally.
If you want to diagnose this yourself it shouldn't be too hard. You will need a 12 volt test light or a multimeter to test for voltage. The blower motor should be located unther the hood of your vehicle on the passenger side against the firewall. It looks like a round black box with wires going to it. Where the wires connect to it the resistor pack is on the other end of the connector inside the motor housing. There are usually two screws or bolts holding it into the housing. If you take these bolts out it should come right out. You can visually inspect it and you may notice some charring on the circuit board where the resistors are.
I would measure power with you test light from the connector before it goes into the resistor pack. If you are receiving power at all blower settings then your blower switch is likely good since this feeds the signal to the blower motor.
You can then use a multimeter to ohm out the resitors on the resistor pack. If any of them show to be open you have a bad resitor coil there. You have two options at this point, you can unsolder the old resitors that are bad and try and replace them with comparable resitors from radio shack. Or you can go to rockauto.com and order a new resitor pack. They run about $16.00-$20.00.
replace the blower motor resistor. follow the wires from the blower motor to the resistor. the resistor controls the speeds on the blower. this is a very common problem in the winter time do to condensation coroting the circuit board on the resitor
Check all your fuses.( you probably did, but do it again, one at a time) it seems like your control pannel is not getting power. See what wire is the power for the control pannel and bypass it with a jumper wire, giving it power and see if the blower works. Be careful though, make sure you find the correct wire that powers the control, or else you'll burn the control.
The blower motor resistor is located on the back of the blower motor housing under the dash on the passenger side. It can be difficult to get at, but it is doable. Be ready with the ibuprofen the next day for your sore back.
Remove the cover panel from beneath the dash on the passenger side.
Unplug the power 'ribbon' wires leading to the resitor.
Unplug the wires that lead from the resitor to the blower motor housing. There are usually two, one black and one purple that share the same plug.
Remove the short hose that leads from the blower motor housing to the ventilation system ducts.
Remove the blower motor by removing the three hex screws that hold it in place.
Remove the resistor by removing the three hex screws that hold it in place. The resistor is right against the firewall so two of the screws are very difficult to reach. A slender flexible socket extension will make the job easier.
Attach the new resistor in place using the same hex screws. Only 1 or 2 of the original three are needed (the part is very light) if you do not feel like fighting with the ones next to the firewall.
Reatach the blower motor and reconnect the hose.
Plug the power cable wires back into the resitor and the wire from the resistor back into the blower motor.