The fan for the heater/air no longer works. We

Bad connection at heater box under to hood

I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

Hi,
Don't go there just yet ! Most heater motor speed problems relate to the heater resistor ! It's located in the ducting close to the motor assy and usually has 4/5 wires on to it and a 2 screw fixing. This componant must be cooled (hence air duct location) and is solely responsible for motor speeds ! You can check motor fan by test lamp/meter ! Good Luck

If it doesn't run on any speed then check fuses and relay's under the hood in the power distribution box,if all are good then use a test light or volt meter on fan motor wires with fan switch set on high,if you have power there then replace fan motor,if the fan works on some speeds and not others than check the fan speed control module,it is located in the air duct on pass side below glove box.

your mode door sounds like it is not moving
the air distribution is control by an actuator(motor) that sits on top off a door that moves to distribute air flow to whichever setting you set it to-if the door is broken it will no longer move and will stay on one setting all the time-the same thing will happen if the motor is no longer working. the only way to be sure is to physically check the motor. this is located on your heater box which is the large black box that is under the dash on the passenger side(it very big-just look under the passenger side dash and you will see it)if the motor is not working-replace it-if it is working you will have to replace the whole heater box which can be a pain-usually the dash has to be removed.
hope this helps

look for relay or resistor heater box under hood passenger side follow heater hoses 2 two heater box coming out of fire wall

Have the front heater core flushed ,since there is heat to the rear the thermostat is fine so it could be plugged.If the fan works on no speeds the check the fuse for the heater fan,if it's good you neerd a blower motor.

where the blower motor wires plug into on the heater box right behind the glove box . that lil rectangular plate has 2 screws holding it into place . you may have to replace that . you may have to replace . the blower motor . or the fan control switch , im assuming it would be the one in the center . that controls ac / and air flow

Most of the time this is a bad "blower motor resistor". It is easy to replace. You will find your behind the glove box in the ac/heater (evaporator) housing. Below is a pic of the resistor as it is seen from behind the glove box. 1. resistor assembly. 2. harness 3. fasteners (2). 4. lower edge of glove box. (open).

Check the following fuses:
10 amp GAUGE under the dash, and the 40 amp HEATER under the hood.
If both fuses are good, I suspect that you may either have a bad fan switch or a bad heater fan motor. The switches are rare to fail, I would suspect the heater motor first. Please try this: Turn the key on; turn the fan switch to high. Look under & behind the glovebox, for the bottom of the heater fan motor. Round thing with 3 screws holding it to the heater box. Using a small hammer, or something that you can tap with, tap on the bottom of the heater fan motor. You just may jar the motor enough to make it run. If it comes back on, you may need to replace it at some point in the near future. Worked for me quite a few times. Try that, repost to me what happens. Hope this helps.