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Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

I'm replacing the blower motor on my 91 245SE, which has been making noise for a year or so, and progressively getting louder.

As part of the project I bought a replacement resistor as well, figuring the old one might be in pretty bad shape after 260K+ miles. I bought an MTC resistor because it was way way cheaper than OEM. From what I've read on Art's site, the weakpoint in the cheap resistors is the wiring, not the resistor itself, so I figured I could always splice in the factory wiring.

I've got it all apart now (ugh, been working on it all day...), and the original resistor looks great. No sign of overheating, and the shielding on the wires isn't hard or discolored at all.

I'm inclined to reuse the original resistor, especially since I've got to do this job on the other 240 soon as well, so I might need the new resistor for that car, but what is your opinion?








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    Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

    When I changed my fan motor the new resistor was cracked and so I used the old one that, just like yours, looked fine. I talked to a 20 year factory tech and he said he had only seen two of these go bad in his whole career.

    Hawk








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      Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

      The ones at the factory never went bad. These resistors they used would survive anything except a nearly locked rotor blower motor being told to run at half speed by a Volvo owner.
      --
      Art Benstein near Baltimore

      Why is it that doctors call what they do 'practice'?








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    ANSWER Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

    Been driving maintaining 240 for 30 yrs have done many fan motor replacements
    never replaced resistors,never had problems.As others have said if original looks good it is,it is not a wear item.
    --
    Rene

    This post has been marked as an answer to the original question.








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    ANSWER Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

    If the old one looks good, it is. Use it. You are changing your fan motor before it got bad enough to cook the resistor. When it cooks, it turns color, and looks like the example in my 1990 writeup.

    This post has been marked as an answer to the original question.








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      Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

      Hey Art, just wanted to thank you for the writeup (and all your writeups). They have been tremendously helpful.








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    ANSWER Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

    The aftermarket resistors themselves are bad. I have seen two with the resistive element unwinding from the ceramic core brand new. The wiring and connector suck too.

    I think I discovered last time that the Volvo resistor was not so much more expensive that it wouldn't be worth the expense (try Tasca parts). If your original resistor works and appears sound, reuse it.

    This post has been marked as an answer to the original question.








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      Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

      I second the opinion of reusing the original resistor. It real world proven and verified!

      Resistors have no moving parts and since your airflow never stopped it has not been put under any excessive strain.

      Aftermarket items could be as my Dad use to say about Radio Shack parts. He said, They would buy parts from a manufacturer, the ones that fell on the floor as rejects or start up tests. The manufacturer sweeps them up into boxes. Radio Shack buys them, runs sample test batches and packages them in different ways at different prices!

      He told me this because I once tried building on of their new, large (3/4"), RED LED clock kits! I was going to custom make one to fit into the dash of my full size '74 pickup. They did not come with a clock and they were junk in any vehicles back then anyway!

      With this kits plan had you buy individual packaged up components, a la carte. Unknown to me it had unmarked diodes in it. I knew very little about what I was attempting to do. Just a young snot, you see!

      I ended up putting them all in backwards by trying to read them with a ohmmeter for polarity. I missed named their ends to the flow of the meter leads.
      My Dad asked, why did you use unmarked diodes in the first place? He replied, Ah, huh, they didn't make it though the line!
      That's when I got the low down on that paragraph above plus I never used it in the truck. Stupid me did not know It needed to see an 60 hertz AC signal pulse to keep time.
      A Dud, was my whole idea!
      Still got the stupid thing in a box, somewhere, since the seventies. It Never did light up all the segments correctly. Dad said it was probably in the display driver?
      Again, Radio Shack! Maybe that's why they dumped having so much stuff like that in their stores.

      Anyway this happens in all industries.
      Often there are "pallet buyers" doing the same thing except they sell the goods themselves or to those who have niche markets.

      In our cases the, Trick is finding a chain of reputable middlemen!

      There are always a buck chaser out there in the marketplace with grab bag offers. Gamblers and suckers are raised alike. Their are on every corner and on both sides of the sales counter.

      I know about those feelings of shopping, as I do it myself? No one likes being ripped off but getting sold junk too boot, stings with the same pain! (:-(

      Oh! Jeepers and greasy creepers, I wrote a short story again, sorry! Darn opinion questions, get me every time!
      Phil








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        Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

        "Oh! Jeepers and greasy creepers, I wrote a short story again, sorry! Darn opinion questions, get me every time!"

        Try pretending the question came from a woman. And prepare to be blamed.
        --
        1980 245 Canadian B21A with SU carb, M46 trans, 3:31 dif, in Brampton, Ont.








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          Your opinion: Replace the Blower Resistor, or keep the old one? 200 1991

          Yes! I think you might have something there!

          Good thing I did not use the phrase in the ways others have.

          I shortened it to make it rhyme with a garage tool we use! Just tinkering!

          An example that convinces me that the world has too many different languages. Each having different geographical resources, coupled with the human imagination, that creates a mismatch of beliefs. So, we will never truly understand each other intentions.

          Yes, you are spot on (English phrase), it all started with a men and women, in each local, communicating or not!

          Get this;
          "A notation made by one and ignored by the infinite many."
          Similar to phrase that Spock quoted in a movie before the Genesis movie. I forget the episode as I am not a true blue Trekkie.

          Thanks for your thoughts.
          Phil







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