Question about Buick LeSabre

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Heater fan not blow

Vehicle has 101,000 miles and sat for 2 1/2 yrs prior to my ownership Heater control panel(s) lights flicker. You can sometimes hear the control panel shift from heat to defog, but no fan. On a side note the radio also flickers on/off, am/fm1/fm2, wanders stations while on (ghost inhabited).

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  • Buick Master
  • 4,514 Answers

U need a complete inspection from engine to tires--fan motor cud hav corrosion or wear-if u replace consider ac evap and heater core too--purchase a repair manual for ur model

Posted on Jan 01, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 220 Answers

SOURCE: Blower Fan will not blow on 1995 Chevy Suburban

It sounds like your blower motor may be bad. I don't know if you know how to check power at your blower motor plug, but you can use a volt/ohm meter or a test light. If you have power (12VDC) , your motor is most likely bad. There is also a resistor block module which has 2 resistors on it. It controls the motor speed basically by restricting the power by directing it thru one of the resistors. The higher the resistance, the slower the motor turns, thus the 3 speeds for the motor. The resistor module is mounted on the blower housing and has 2 screws holding it in with a small plug connected. It is just about straight ahead of the passengers left knee.
You can get used motors from a junk yard pretty cheap.
Good luck

Posted on Jan 28, 2009

  • 1619 Answers

SOURCE: merc c class heater problems centre blowing cold and sides hot

Bad vacuum pod, try using a mini vacuum and the on the valve block behind the glove box take suction on each one till you find the bad one.

Posted on Jun 15, 2009

contact348
  • 2 Answers

SOURCE: 1999 cadillac deville d'elegance heater problem

i've been down here too myself, and discovered that the temp control motor, located in the bottom of the glove box, which you can access by clearing all your stuff in in and opening a small door.
you can adjust it manually, and see if it changes, if yes, the switch can be defective, as well as the motor, the switch is the most likely problem.
but adjust it manually first.

Phil
grandmotors.ca

Posted on Jan 12, 2010

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Heat does not blow onto windscreen but blows through other vents - whats wrong


What make an model an year vehicle do you have ? The air blows out of the floor vents an center vents but not defrost ? Possible mode actuator , stuck mode door ! There is a door inside the heater / A/C assembly that directs the air to the desired position . These doors can be moved by a vacuum operated actuator or an electric motor . Sometimes thing's put on the dash end up inside the heater box , fall through defroster vent ! Pens , pencils etc.. Depends on the make vehicle an system , manual , or automatic climate control . Some of the newer vehicles the HVAC system as it is called , the control panel is a electronic control module an can store DTC'S - diagnostic trouble codes !

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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

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Heat NOT blowing out ANY air consistently!!


Can be blower motor easy to test --remove it look for imbalance by spinning to check bearing smoothness / freeplay . Hook up ground then use inline fuse connector with lower than fuse panel ## number of fuse -- find power Eg .car battery -- be sure to ground then connect Fan to visually see it spin .. NOW if you have any type of electronic dash mounted controls for heat / air conditioning - most likely electrical issue is in it . you said blower motor does sometimes function - Test wires that plug in to it for power / find groung then probe by test light when in heat mode = switch to air cond mode if fan functions then problem in controls on dash .. if no test light reaction search wires for short or damage .. As FUNNY as it sounds I have pulled mouse nest out of GM heater fans - They access parked vehicle by drain hole inner fender well it drains water from wiper blade / heater vent area .

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1 Answer

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Check fuses to the A/C or Heater Control Unit in the fuse box(es). IF none are blown, then may have to replace A/C-Heater Control Unit:

A/C-Heater Control Unit Removal & Installation To Remove:
  1. Before servicing the vehicle, refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • Negative battery cable
    • Center bezel from the instrument panel A/C-Heater Control chr_pacif_ac_htr_cntrl.gif

    • Three screws that secure the A/C-heater control to the instrument panel
    • A/C-heater control from the instrument panel
    • Two wire harness connectors from the control
To Install:
  1. Install or connect the following:
    • A/C-heater control to the instrument panel
    • Two wire harness connectors to the back of the A/C-heater control
    • A/C-heater control into the instrument panel
    • Three screws that secure the A/C-heater control to the instrument panel
      1. Torque to: 17 inch lbs. (2 Nm)
    • Negative battery cable and calibrate the A/C-heater control
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2 problems?
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I think you could be right about there being air trapped in the system.
Or the heater core(radiator) is plugged.
Either way you need a pressurized radiator coolant pump to put the coolant in without air being trapped.
Although,i have seen it done by jacking the vehicle up high enough that the radiator was now higher than the heater core level, and then the coolant was put in.
But this is dangerous to try.

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did u replace the fan motor.try to tap on the fan motor see if it comes on.

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Replace the temp control on this car, it should be electrical control not cables.

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