blower motor resistor
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I know this thread is 5 years old but I thought I'd just say thanks for all the info. The little spat about rheostats vs. resistors was helpful. Since I didn't know what I was looking for, when I pulled my resistor pack out I was able to immediately recognized for what it was --it's all about the coils. And I even understood why there were only three coils for my 4-position switch (high speed let's all go through) The bottom line on my repairs today was that the resistor pack wasn't the problem --nor the switch. The fuse had blown! Lesson: always start at the beginning.
thanks again
thanks again
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I'm no expert by any stretch of ones imagination, but according to a lot of web-based research, I think it's just called a "resistor pack" or "blower motor resistor." These appear to be widespread terms used in various car models (not just Ford).
If you Google "Ford Heater Resistor Serial Number" you'll get a number of hits. My strategy was to remove the part and take it in to the dealer --but as I mentioned, all I needed was a 10-cent fuse. (well, make that $3.00!)
I have an '89 F150.
If you Google "Ford Heater Resistor Serial Number" you'll get a number of hits. My strategy was to remove the part and take it in to the dealer --but as I mentioned, all I needed was a 10-cent fuse. (well, make that $3.00!)
I have an '89 F150.
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I have worked at Ford for 14 1/2 years now at the Sheldon Road Plant in Plymouth MI. We are the climate control division of Ford. I have been one of the Final Inspectors for the F Series heater/AC assembly for a number of years now, and we referred to the part as the blower motor resistor. NOT a rheostat. There IS a difference. If the blower runs at high speed only, the resistor is most definitely bad because at high speed the blower bypasses the resistor and runs at full current. This is my first post, but I hopes this helps.
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The bad thing is that when I see and test the part, it is not yet in a vehicle. (My plant only makes the climate control systems) I only see the complete air handling unit. I have inspected on the Taurus-Sable, F-series and Expedition-Navigator lines. There are a lot of similarities between parts though. The resistor should be held in with two screws that take a 5/16 socket. I don't know the exact location of the resistor on the Ranger unit. So, offhand I can't tell you where to look for it at on the vehicle. Monday I can talk to somebody on the Ranger line and find out for you. Sorry I can't be of more help right now.
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Here's my problem: When my blower blows, I have all 4 speeds, but I have intermittent voltage at the blower motor. I first suspected a fuse or relay, but the intermittent thing sort of rules that out. My local Ford dealer says a faulty resistor can cause such a malfunction, so upon this advice, I've found and removed the blower resistor on my 2001 F-350. Any thoughts before I replace a circuit that may or may not need to be replaced?
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The resistor could be the culprit, but with it being intermittent, you might also want to check the wiring harness to see if there might be a broken wire, a bad ground, a bad connection, etc. The intermittent problem could be any of these. At the plant we have TONS of spare parts so we would just swap one thing out for a new one and see if that would be the fix. I know it's not quite that easy and convenient when it's on your own vehicle!
Good luck.
Good luck.