heater

>I got a ford f-150(1992) and well not the
> heater, but the fan itself will not turn on
> unless it is on high. I put it on low and
> medium and nothing happens, but when
> I put it on high it always turns on. I'm
> curious does anyone know what this
> could be? it is a manual tranny with a
> 6cyl 4.9L.

>Blower motor resistor needs to be
> replaced.

The blower motor speeds are controlled by the resistor pak which is
controlling the ground to the motor. Having only High speed means the
motor has a direct connection to ground. The lower speeds use higher
resistance because of the different values in the resistor pak. The pak
is located in the blower-motor housing on the passenger side in the
engine compartment. You will see some wiring to the housing and they
plug into the resistor pak. The part is about $12 and available in
parts stores. Failure is a common fault with this part.

Dave S(Texas)
 >> Stay informed about: heater 

ya I replaced the resistor and it fixed my problem, but let me tell you
that getting that old resistor off and the connector apart took my
almost 2 hours. I had to cut everything off, because the old resistor
and connectors were rusted together. I did get it apart, but what
should have been a 5 mins job took me 2 hours, because I didn't want to
cut the wires. After that ordeal everything works fine and thanks for
the info.
 >> Stay informed about: heater 

mitsurugi3644 DeleteThis @hotmail.com wrote:
> ya I replaced the resistor and it fixed my problem, but let me tell you
> that getting that old resistor off and the connector apart took my
> almost 2 hours. I had to cut everything off, because the old resistor
> and connectors were rusted together. I did get it apart, but what
> should have been a 5 mins job took me 2 hours, because I didn't want to
> cut the wires. After that ordeal everything works fine and thanks for
> the info.

Where the pack located - engine compartment or under dash? Got a
ranger w/ low fan speed out.
 >> Stay informed about: heater 

David M wrote:

> > Where the pack located - engine compartment or under dash? Got a
> > ranger w/ low fan speed out.
>
> Usually under the dash,look on the air ducts
> for a rectangular port with several wires coming out of it. The resistor
> is mounted in the air duct so it will be cooled by air movement.

Thanks, Dave. Got a Haynes and will also look if it's included in there.
 >> Stay informed about: heater 

This message is not archived
 >> Stay informed about: heater 

could be the switch, could be the resistor.

steve

<mitsurugi3644 DeleteThis @hotmail.com> wrote in message
news:1163589677.913496.239610@m73g2000cwd.googlegroups.com...
>I got a ford f-150(1992) and well not the heater, but the fan itself
> will not turn on unless it is on high. I put it on low and medium and
> nothing happens, but when I put it on high it always turns on. I'm
> curious does anyone know what this could be? it is a manual tranny with
> a 6cyl 4.9L.
>
 >> Stay informed about: heater 

could be the switch, could be the resistor.

steve

<mitsurugi3644.RemoveThis@hotmail.com> wrote in message
news:1163589677.913496.239610@m73g2000cwd.googlegroups.com...
>I got a ford f-150(1992) and well not the heater, but the fan itself
> will not turn on unless it is on high. I put it on low and medium and
> nothing happens, but when I put it on high it always turns on. I'm
> curious does anyone know what this could be? it is a manual tranny with
> a 6cyl 4.9L.
>
 >> Stay informed about: heater 

could be the switch, could be the resistor.

steve

<mitsurugi3644.RemoveThis@hotmail.com> wrote in message
news:1163589677.913496.239610@m73g2000cwd.googlegroups.com...
>I got a ford f-150(1992) and well not the heater, but the fan itself
> will not turn on unless it is on high. I put it on low and medium and
> nothing happens, but when I put it on high it always turns on. I'm
> curious does anyone know what this could be? it is a manual tranny with
> a 6cyl 4.9L.
>
 >> Stay informed about: heater 

ACTUALLY, they are usually on the engine side of the heater case next to the
blower motor.


steve


"Flasherly" <gjerrell.DeleteThis@ij.net> wrote in message
news:1163857230.678935.228420@m73g2000cwd.googlegroups.com...
>
> mitsurugi3644.DeleteThis@hotmail.com wrote:
>> ya I replaced the resistor and it fixed my problem, but let me tell you
>> that getting that old resistor off and the connector apart took my
>> almost 2 hours. I had to cut everything off, because the old resistor
>> and connectors were rusted together. I did get it apart, but what
>> should have been a 5 mins job took me 2 hours, because I didn't want to
>> cut the wires. After that ordeal everything works fine and thanks for
>> the info.
>
> Where the pack located - engine compartment or under dash? Got a
> ranger w/ low fan speed out.
>
 >> Stay informed about: heater