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My blower only blows on high nothing else - 2003 GMC Savana

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POSSIBLE CAUSE BAD BLOWER MOTOR RESISTOR OR BAD BLOWER MOTOR CONTROL SWITCH.

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

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1 Answer

I have no heat or air blowing out of my vents. Any ideas?


still nothing,????
why do this backwards. ??
or not using simple diagnosis>?
so really you failed to state the beginning symptoms?
was it just just noise. or noise and no blow.
or the noise is gone,, but my fix broke the blower.
there will no heat not moving, if the blower is dead.
get heat , moving in non circ, mode.?
sure i bet you do an that is SOMETHING.
does the blower make sounds like a normal blower, then if no air flow
the dampers are bad.

blower silent? on all speeds, , do say so.
blower works only on high (sounds) ?
if the blower is running, surely you can hear it spin fast.
and there is no flow, the damper is bad or the blower fan blade set screw
is missing and or loose. did you check that screw first. before.
replacing the motor? id not ever skip that step.
we can not help you ,with no facts or symptoms but still nothing.

Sep 16, 2014 | 2006 Jeep Commander

1 Answer

Ford F-350 blower only works on high?


It will either be the switch or the blower motor. You can test the switch with a volt meter at the blower motor conection and see if the voltage changes with the switch. I do not know what the actual voltage should be, but if you get nothing accept on high the its the switch. Otherwise look towards the blower.

Feb 02, 2013 | 2008 Ford F-350 Super Duty

1 Answer

Blower motor doesn't blow anymore, This blows


If it blows only on high speed, it is the resister.
If it does not work at all, check fuses first. See owner manual for location.
Then check blower motor by jumping 12 volts from battery to blower motor. Make sure ground is jumped too.

If it works now, it's the control panel. If not, it is the motor.

Blower Motor —Front Removal and Installation
  1. Prepare the vehicle for blower motor (19805) removal.
    1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
    1. Remove the air cleaner assembly. For additional information, refer to Section 303-12 .
  1. Detach the speed control servo.
    1. Disconnect the electrical connector.
    1. Remove the bolt.
    1. Position the speed control servo aside.
  1. Position the coolant expansion tank/windshield washer reservoir aside.
    1. Remove the screws and the nuts.
    1. Position the coolant expansion tank/windshield washer reservoir aside.
  1. Remove the blower motor.
    1. Disconnect the vent hose.
    1. Disconnect the electrical connector.
    1. Remove the four screws.
    1. Remove the blower motor.
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Also,

Heater Blower Motor Switch Resistor(s)
The front heater blower motor switch resistor has the following features:
  • The assembly is located in the engine compartment on the evaporator housing (19850) next to the blower motor assembly (19805).
  • Three resistor elements are mounted on the resistor board to provide four blower motor speeds.
  • Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or increase A/C blower motor speed.
  • An overheating device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121°C (250°F), interrupting the blower motor operation in all speeds except high.
  • The thermal limiter cannot be reset and is not serviceable.

Aug 10, 2009 | 2001 Ford Explorer Sport

1 Answer

A/C -- Blower controls not working


usually you have a leak in the system low on freon this dual system take more than 2 pound of freon second the blower works only on high you need the blower motor risistor usually it is mounted next to the blower motor

Aug 08, 2009 | 2002 Chrysler Town & Country

2 Answers

Blower dosent blow on high


fan blower speed switch under hood usually in fire wall or in heater box under dash area if you do not change it you will keep losing all your speeds until nothing left! it is not!!!!the one in your dash that you hand operate! hope this helps.John

Jan 24, 2009 | 2006 GMC Envoy

1 Answer

Car heat blower is not blowing heat/air into the car


it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.

Jan 16, 2009 | 1999 Audi A4

1 Answer

Car heat blower is not blowing heat/air into the care


it's either a fuse or it's a bad blower motor, it could be a bad blower motor resistor but usually you'll get either high or low only, so if you have nothing on any speed, high low etc, and all the fuses are ok chances are it's your blower motor.

Jan 16, 2009 | 1999 Audi A4

1 Answer

Heater / Air only work when blower is on set on high


You need to replace the blower speed control module, it is behind the glove box near the b;lower motor.

Oct 26, 2008 | 2001 Dodge Intrepid

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