Question about 2002 Dodge Grand Caravan

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Heater fan runs on high only . switch does not control speed of fan all other controls seem to work fine

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Heater fan runnin on high only? Wow.......kinda feels like a hurricane doesn't it? You described a tsb to the t......I love it when people give an accurate history......now...what ya need to do is get up under the pass side of the dash.....open the front pass door...get on your knees and look up underneath the glovebox....that is where your blower motor resistor is...right next to your blower motor itself....your blower motor is the big flying saucer looking thing..and your resistor...which is what youre replacing...is about the size of a business card.that is whats keepin your motor on high and not adjustable......the part should run a little more than fifty dollars i believe........k......HOPE I HELPED!!!!!

Posted on Nov 14, 2009

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Posted on Jan 02, 2017

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1 Answer

How to disconect the control cables on 1997 geo metro heater control?


does the fan work on high.
yes, then the heater resistor block is burned up. replace that
or look at it to see if the coil there are burned up and gone.
please post systems first, then your guess.
the FSM covers all this, step by step, take apart dash. under
HVAC chapter,.
alldata.com log in and its there.
factory service manual.
removing the control is tricky on all cable cars.
you must get the cables loose before the panel can move out.
the cables all clamped down or they will be dead. (all cars with cables drive)
please post of HIGH speed blower works on high first.
why do this the hard way, at the worst we can use a voltmeter
and prove what is dead, first.

see those rules on cables in the FSM below?
ill not post the panel Remove
  1. Disconnect the negative battery cable.
  2. Remove the heater control unit from the instrument panel.
  3. Remove the mode and temperature control cables at the heater case. Remove the cables from the vehicle.
  4. Remove the fresh/recirculate control cable at blower case and remove from vehicle.
  5. Installation is the reverse of removal.
  6. Adjust the cables prior to attaching at heater control unit.

now lets look at the blower, dead, on all speeds but HIGH , i bet.
?????????????????
this is your cave man simple blower
so if FUSE marked HTR is good, and 12vdc is on both sides of
fuse keyon, then it is good,. and 12vdc lands on motor top
where below on HIGH the blower and switch works on high.
if say the right side resistor blows up, (as all do)
then all lower speed fail. and DC power fails to reach the fan motor.
how is that? clear>?

25490481-331th0o4ygoodik5f23zyrbq-3-0.jpg

Feb 27, 2015 | 1997 Geo Metro

3 Answers

I only get the fan to work on high speed, the lower speeds do not work


Hi!!
The Blower Motor Resistor also called Manual Temp. Control resistor), is fried, replace. The price with floor console $25 and without floor console $65. here is a pic.
87b9810.jpg

the resistor is located on the blower motor housing, fastened by two screws. It is the part where the electrical plug connects, the plug on the pic. goes to the blower motor.
A HELPFUL - 4 THUMBS rating for this solution would be greatly appreciated. Thank you for using FixYa.

Oct 19, 2010 | GMC Yukon Denali Cars & Trucks

1 Answer

I have a 1991 Buick Park avenue with 44,000 miles that is not blowing air through the vents. I just put a brand new resistor in and that changed nothing. The fan spins at a low speed when the car is turned...


Switch the relay with one of the other relays to make sure that this relay is good then go to the HVAC control programer which is behind the floor vent (middle). The Blk/gray wire is the one that supports the relay coming out of the HVAC programmer, but there is a chance that this programmer is bad. If that proves to be the case, I may even have one...let me know.

Aug 06, 2010 | 1991 Buick Park Avenue

2 Answers

Heat/ac fan only blows on high


Check the heater control switch,,,,,and the number of wires at the heater motor....Some motors have more than one winding...in which case there will be three or more wires going into motor..there can be burnout in those windings and will require a new motor....check the plug which attaches to the motor....can be bad connection...or at the switch.....but if there is only two wires....then the heater switch uses resistors to slow down the different speeds...and direct connection for high speed....and the problem is definitely the switch...

Apr 27, 2010 | 1996 Lincoln Town Car

1 Answer

HEATER FAN CONTROL DOWN TO 2 SPEEDS


The control is not the problem. Your blower motor resistor is burnt out on two fan speeds.
This is a high failure rate item that the factory has redesigned at least twice for this concern.

Feb 24, 2010 | 1999 Chevrolet Venture

2 Answers

I have a 1999 Jeep Wrangler and the heater fan stopped working for all the fan speeds. The fuses are fine. How do you know if it is the blower resistor or the blower motor?


If you bypass the resistor pack and connect the motor directly to the fused 12v supply then the fan should run at maximum speed. If so, it's the resistor pack that's blown: a very common fault on a huge number of makes and models.

Feb 13, 2010 | 1999 Jeep Wrangler

2 Answers

Heater fan motor wont run on high


Check or have checked the blower motor resistor. This is usually how they act.

Oct 25, 2008 | 1995 Oldsmobile 88

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