Question about 1998 Ford Escort

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Fan speed control won't work

I have replaced the fuse and still the fan switch does not work. How do I get the face plate off to check the connections on the back of the switch? Where would I find a diagram(s).

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Http://autorepair.about.com/library/faqs/bl225i.htm Follow this link and read the article about the fan repair procedure.

Posted on Aug 25, 2008

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2 Answers

Why does'nt my heater fan work?


There could be a number of reasons. Fan is bad, fan area in box is so clogged it doesn't allow fan to spin, a bad switch at instrument panel, a bad resistor, bad connections. I would start by removing the fan. I believe you will have to go in behind the glove box. Remove the fan and check to see if it works, it may be fine if bad replace. Check inside of box for leaves and any other kind of clutter that may be preventing fan from spinning. Check wires to fan for mouse damage. Mice can take there toll on a cars wiring. If all is well so far check the switch in your dash. Switches are funny, some last a life time some don't. I believe you will find your problem, following these steps. GOOD LUCK FRIEND.

Nov 28, 2014 | 1995 Buick LeSabre

1 Answer

A/c blower stop working all speeds, check have power, ground out speed sensor and fan comes on, replaced speed sensor, now fan just works on high when wiggling fan switch, I replaced fan switch, now...


Depending on the year and model, you should have a resistor that controls fan speed. Not sure what a speed sensor is.
On most import cars, the speed is controlled by the ground circuit. If you have power and the fan will run if you ground it, check the fan switch again and the resistor. Then look at the ground for the switch.

Jul 17, 2012 | Hyundai Santa Fe Cars & Trucks

2 Answers

Fan does not work no heat..


make sure all fuse OK , and make sure your blower motor is OK , . and let me know pleas . good luck .

Nov 09, 2011 | 1997 Ford Escort

2 Answers

Heater blower stopped working?


Hello,
You may want to try your fan on all speeds. If it will work on high, you have a bad resistor for the fan motor. ( high speed doesn't go through the resistor ).
If it doesn't work on any speed, I would check the following;
1. Make sure the fuse isn't blown for the fan blower motor.
2. Check, or have checked the wires between the fan control switch and the fan blower motor.
3. Have the fan control switch checked.
4. Have the fan blower motor checked.

I hope this helps you.

Feb 03, 2011 | 2002 Buick Rendezvous

1 Answer

I have a 1997 oldsmobile eighty-eight and the fan one day over the summer 2010 went off and on with the blower switched on. It caught my attention but kept my fingers crossed. Within a few days the fan...


It does sound like a bad switch --- possibly arcing and overheating -- or it could be dirty / corroded contacts on the switch or in the wiring harness connector.

The switch should come out fairly easily after getting access to the back of it -- it probably has tabs on it which when pressed in will allow the switch to come out the front.

Charlie


P.S. The blower motor resistor would not cause an overheating switch -- a bad resistor would at worst allow maximum current to go through the switch -- the switch is designed to run the blower at full speed (maximum current) w/o overheating...

Jan 29, 2011 | Oldsmobile 88 Cars & Trucks

1 Answer

Replace fan speed switch


Before you replace the fan speed switch...make sure you check the fuse...then check the motor...and finally check the resistor assembly...the resistor assembly controls the different speeds of the fan motor by allowing the switch to put different resistors in and out of the circuit to reduce the fan speed...it is usually located on the heater housing near the fan motor..they are a common failure...the switches don't fail as often

Jan 20, 2011 | 2002 Pontiac Sunfire

1 Answer

Where is the blower motor? heater in car dosent blow. not under hood, cant get through glover compartment.


This work for 1998 Buick Century 3.1L SFI OHV 6cyl; the blower motor is a variable speed motor. The higher the voltage applied to the motor, the faster the speed. Depending on the HVAC (Heater Ventilation Air Conditioning) option installed in the vehicle, blower speed control could be through a set of resistors or through a solid-state blower motor control module.

In general, this system is reliable. Because so many of the control operations are electronic, special diagnostic equipment really should be used for system diagnostics and check-out. An authorized technician using a scan tool can most quickly locate HVAC problems.

zjlimited_78.jpg

Fig. Typical behind-the-instrument panel view of HVAC related components. Depending on the HVAC option, not all components are used on all vehicles (click for zoom)

zjlimited_79.jpg

Fig. Typical HVAC operation schematic

An inoperative blower motor could be caused by the following:

* Blown fuse(s). The fuse should be replaced. There may be both a LOW BLOWER and HIGH BLOWER fuse. Some models may also call it the HVAC fuse. Even the RADIO fuse is used in some applications. Check them all. If a fuse is blown there may be a short to ground in one of the power supply circuits.
* Open Circuit. Check the circuit between the ignition switch and the blower motor, and the blower motor ground circuit. Repair as necessary. * Faulty blower switch. A faulty blower switch should be replaced. * Most heater blower circuits also include a blower motor relay (look in the underdash convenience center), as well as a blow motor resistor. These items should be checked especially if the blower runs in one or two speeds, but not all speeds selected.

REMOVAL & INSTALLATION

  1. Disconnect the negative battery cable.
  2. The blower motor is located on the passenger side of the vehicle, under the instrument panel. Remove the right side sound insulator (trim panel) by removing the retainers and disconnecting the courtesy lamp.
  3. Detach the blower motor electrical connector. Some applications may have cooling hose to the motor which should be disconnected.
zjlimited_80.jpg

Fig. Blower motor and fan assembly removal

  1. Unfasten the blower motor mounting screws, then remove the blower motor from the vehicle.
  2. If the blower motor fan (also called a 'squirrel cage') must be replaced, use the following procedure:
NOTE Do not hammer on the motor to remove or install the fan. Do not apply force to the motor housing to seat the fan on the motor, or motor/shaft bearing damage could result. Do not apply pressure to the fan rim. Be sure the correct replacement part is used.
  1. Remove the metal star clip retaining the fan cage to the motor shaft.
  2. Remove the fan by pulling straight out.
To install:
  1. If removed, install the blower motor fan, as follows:
    1. Install the replacement fan cage onto the motor shaft.
    2. Adjust the fan cage to get a clearance of 0.30 inch (7.5mm) to the motor mount plate.
  2. Install the remaining components in the reverse of the removal procedure. Make sure the electrical connection is secure. Tighten the motor screws to 14 ft. lbs. (20 Nm).
  3. Connect the negative battery cable, then test the blower motor for proper operations


I hope this helps (remember to rate and comment this answer).

Nov 17, 2010 | 1998 Buick Century

1 Answer

Heaterfan on ford KA 03 plate 1.3 not working. no


Turned out to be the block connector that joins the wire to the heater fan motor. (Bad connection) removed block connector and made soldered joint. And insulated with insulation tape. (Nothing wrong with the relays,or fuses). All checked out O.K. Job done!

Nov 10, 2009 | 2003 Ford Freestyle

2 Answers

Fan only works on 4 and 5 settings? Is this a


Hi,

Most of the time the blower motor resistor will fail, but the fan would still work on high if this was the case.

Double check the HI BLO fuse in the underhood fuse block, and the HVAC BLOWER fuse in the ip fuse panel. If this fuse is ok, then the issue lies with either the relay or the fan.

You can swap the Blower Motor relay with another one of the same type and see if the fan comes on. If so, then the relays is the failed part.

Also, place the fan speed on high, unplug the blower motor and connect a test lamp between both terminals on the blower motor connector. If it lights, then the issue is the motor.

It's easy. A generic procedure to replace is :-

  1. Step 1 Locate the blower motor and look around the outside and close to the motor for a 2 by 3 inch plate held in by two or four small screws. There will be an electrical connector plugged into it with five or six wires, depending on the vehicle type and heating and air conditioning type of control panel.
  2. Step 2 Test the resistor before replacing it. It is always recommended to test any electronic unit before replacing because there are a multitude of things that could cause the same symptoms. It only takes a few minutes and can qualify the assumption that a part is bad. It will save money and face to replace or repair the right part the first time.
  3. Step 3 Check the speeds by turning the fan conrol to all positions and taking note of speeds work and what speeds do not work. If the fan works only on one speed the blower motor resistor is very likely bad.
  4. Step 4 Check the fuses if the fan speeds do not work. The fuses for the interior heating and air conditioning fan are usually under the hood in the fuse and relay center. If the fuse looks good, then take it out and turn the ignition key on and use the volt meter set at 20 volts DC. Check to make sure that there is voltage to the fuse. If not, check for an open circuit to the fuse.
  5. Step 5 Check the relay to determine if there is power at the fuse. The relay should have two of the four terminals showing power. With the key on and the fan turned on, remove the relay and put it back in, listening for it to click. If it does not click, then replace the relay.
  6. Step 6 Check the voltage at the electrical connector on the blower motor resistor to see if the fuse and relay are good. Make sure that power is present at the connector with the key on and the fan switch on. There should be power at two terminals of the blower motor resistor. If only one terminal has power, replace the resistor. If two terminals have power, replace the blower motor itself. Remove the screws and unplug the connector to remove the blower motor resistor. Put the new one in its place by screwing it back in and plugging in the wiring connector.

Thanks.

Sep 07, 2009 | Chevrolet Malibu Cars & Trucks

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