thermal limiter resistor question

[puddle jumper]

i replaced the blower motor resistor assmbly in my 93 with a new one from ford at$20 with tax, only to have it go out 1 month later for the same problem, only high speed worked , i looked through the threads on the subject and read about replaceing the thermal limiter resistor with a $2 one from radio shack, went today to get one and found out radio shack no longer carries this item and it cannot get one and wont get no more !!! so i went to my local tv/electronics repair shop and they at first didnt know what i was talking about and then said they couldnt get one ??? well , does anyone know where to get one from (other than ford garage ) or can i put a thermal fuse in its place ? or does it have to be a resistor ?? what value of the resistor does it have to be (ohms,current ect..)

 

[Opera House]

I wouldn't put too much stoc in what some counter guy making minimum wage says. Part number is 270-1321 which is still listed on their web site. Try a couple other stores. I was always amazed that every store I ever went to carried it. You can also go out on trash day since every coffee pot and hair dryer has one. You could also use a length of solder which melts at about the same temperature. Sounds like you need a motor.

 

[puddle jumper]

thanks opera house !!! the part number you gave looks different than the one they were trying to look up for me , it was a 270-0110 number and was probably the wrong one anyway , i`ll take that number with me when i go back to radio shack on my next day off and pick up a few for spares , but i will get a new blower motor installed first before i go through more thermal resistors !!

 

[DeRocha]

Like Opera house said the problem is very likely your blower motor going bad.. When any electrical motor goes bad it draws an ever increasing amount of amps. This is because some of the wire winding within the motor has lost some insulation and shorted out with a neighbor wire. .. This short creates a small additional amp draw, but as other shorts develop the cumulative amp draw being pulled through the resistor pack causes it to fail (much like the filament in a light bulb).