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How to replace the heater motor in a 1977 f150 with a/c

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You will need to remove the glove box for access, then you will be able to see the fan motor. It is possible to remove the motor while the heater plenum is still in the truck, but it makes it a lot easier to remove the plenum then switch out the bad motor.

Posted on Nov 17, 2013

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1977 Buick blower / fan comes on however NO heat blower / fan also blows very low.


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Jan 30, 2016 | 1977 Buick Electra

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Why wont my heat in my1997 ford f150 work


check coolant level and temperature of the heater hoses after the engine is at operating temp. the heater hoses should be the same temperature if not then the heater core is plugged and needs replacing. if the hoses feel the same temperature but not heat you may need to replace the thermostat. I am guessing the blower motor is functioning to blow air over the heater and into the cab.

Jan 13, 2015 | 1997 Ford F150 Regular Cab

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Heater fan isn't working in my 1997 ford f150 extended cab 4x4


What have you checked so far ?
Fuse - resistor - power at the blower motor ?

Feb 13, 2013 | 1997 Ford F150 Regular Cab

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How do you replace a ignition modulel on a 1977 ford f150 m in the distributer


On the 1977 the ignition module is an aluminum box that should be mounted somewhere in the engine compartment. The ignition pick-up is mounted inside the distributor and you must remove the drive gear from the shaft in order to pull the shaft out and slide the pick-up off the hub of the distributor. This is not an easy job and most people try replacing the module first as it is usually the problem.

Jun 03, 2011 | 1989 Ford F 150

1 Answer

Blown heater core in a 1977 ford f-150 pick-up


1976-79 Without Air Conditioning
  1. Disconnect the temperature and function control Bowden cables from the heater housing. This must be done to prevent damage to the cables.
  2. Disconnect the wires from the blower resistor.
  3. Remove five screws attaching the air inlet (vent) duct to the heater housing.
  4. Disconnect the blower wires.
  5. Drain the radiator and remove the heater hoses from the heater core.
  6. Remove three heater stud retaining nuts and remove heater.
  7. Remove gasket between the heater hose ends and the dash panel at core tubes.
  8. Remove heater core cover and gasket (four screws).
  9. Pull heater core and lower support from heater.

To install:
  1. Install foam gaskets on heater core and install in heater assembly.
  2. Install the core seal and cover plate.
  3. Position heater assembly in vehicle and install three stud retaining nuts.
  4. Connect heater hoses to heater core and fill radiator.
  5. Connect blower motor wires.
  6. Place defroster nozzle on heater so that the defroster and heater openings are in the up position, and there is no air leak around the seal.
  7. Install air inlet (vent) duct to heater. Push duct firmly against seal on side cowl and tighten five attaching screws.
  8. Connect wires to blower motor resistor.
  9. Connect temperature and function control cables to heater, and adjust the cables.
  10. Reinstall gasket between the heater hose ends and the dash panel at core ends.
  11. Fill Cooling System.

  12. Hope this helps you! Please remember to rate my solution.

    Lefty64

Apr 09, 2009 | 1986 Ford F150 SuperCab

1 Answer

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your problem is caused by the air temperature control blend door actuator motor being defective, the little motor moves the door that gives either hot air or cold air or a blend of the 2.

Feb 21, 2009 | 2004 Ford F150

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HEATER DOESN'T WORK ON A 2002 SUPER CREW CAB


does motor run on only one speed? if so replace the blower resistor.
if it just quit , check for power at the blower motor, if u go power then replace the blower motor

Dec 12, 2008 | 2001 Ford F150 Styleside SuperCrew

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