Before I start taking things apart...anyone have this issue before? Is it likely to be the switch OR the fan/motor/blower itself? TIA!
Fan blows on high only... (1 Viewer)
- Thread starter fj40cm1980
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the resistor
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- #3
Appreciate it...I'll fiddle with mine a bit but looks like CR sells a new resistor for about $100. Thanks!
Land Shark
SILVER Star
I think @charliemeyer007 found one much cheaper
Yea. IIRC it was like $25 w/shipping. I think I posted a link to it. I just googled the spec's and or the part # to find it at some electrical warehouse place back east.
Land Shark
SILVER Star
Yes I knew that was you. Now what thread is that buried in ????
That seems like ridiculous money for a simple part. Anyone know the resistance measurement? That should be available as a wire wound ceramic resistor and a slight cost.
Added later:
I tested mine. In the truck I get around 100 ohms. It is called a tubular ceramic wire wound resistor. Like this Resistor Wire Wound Tubular Fixed 7.5 – 160 Watt – AS ENERGI - https://asenergi.com/en/products/wirewound-tubular-fixed-resistors.html I am not vouching for them. Any old time electronic store should have them for a couple of bucks. A place that caters to audio enthusiasts will understand. You can get them with an adjustable tap. That would allow you to fine tune the speed of the motor. If you get one that its the right physical size, the ability to dissipate heat should be OK.
Mine is 50mm or 2" long. This is my best guess: 100 Ohm 25 W (100R 25W) Power Resistor - Fixed Wirewound Resistors – AS ENERGI - https://asenergi.com/en/products/wirewound-tubular-fixed-resistors/25w/25w-100-ohm.html
I could not figure out the digi-key part #.
Added later:
I tested mine. In the truck I get around 100 ohms. It is called a tubular ceramic wire wound resistor. Like this Resistor Wire Wound Tubular Fixed 7.5 – 160 Watt – AS ENERGI - https://asenergi.com/en/products/wirewound-tubular-fixed-resistors.html I am not vouching for them. Any old time electronic store should have them for a couple of bucks. A place that caters to audio enthusiasts will understand. You can get them with an adjustable tap. That would allow you to fine tune the speed of the motor. If you get one that its the right physical size, the ability to dissipate heat should be OK.
Mine is 50mm or 2" long. This is my best guess: 100 Ohm 25 W (100R 25W) Power Resistor - Fixed Wirewound Resistors – AS ENERGI - https://asenergi.com/en/products/wirewound-tubular-fixed-resistors/25w/25w-100-ohm.html
I could not figure out the digi-key part #.
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Land Shark
SILVER Star
@charliemeyer007 found it. DigiKey p/n L50J1RO-ND
Good job. I looked at 30 pages of my posts and didn't see it so now I can quit looking.
So I googled that part # and it doesn't come up on the didikey site.
So I googled that part # and it doesn't come up on the didikey site.
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Land Shark
SILVER Star
Weird here it is
www.digikey.com
L50J1R0 | DigiKey Electronics
Order today, ships today. L50J1R0 – 1 Ohms ±5% 50W Wirewound Chassis Mount Resistor from Ohmite. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Land Shark
SILVER Star
Maybe you looked at the "didi" site
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- #12
Gosh, gotta love this forum, but more importantly...the kind folks that are always willing to share info and help out! Cheers and thank you!
90WT
SILVER Star
On our 1971, I took apart the switch (in the dash). Cleaned and reassembled, and it fixed the problem. There was a bunch of crud inside the switch preventing a good contact for the low speed.
Sorry to be a kill joy. One Ohm is not enough, one ohm is about a foot of old wire in resistance. I am almost certain that you need a lot more resistance. The resistance is what determines the voltage drop and the fan speed. My meter was hunting around between about 80 and 150 ohms. I stuck pins in the wires and it was not super secure. Maybe someone know the actual specification.Weird here it is
L50J1R0 | DigiKey Electronics
Order today, ships today. L50J1R0 – 1 Ohms ±5% 50W Wirewound Chassis Mount Resistor from Ohmite. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
But check the resistor and see what it is doing. Like others said it could be the switch or a broken wire.
The old resistor is almost certainly broken at one end. You can still probe the wire instead of the tab and determine the actual value of the original part.
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Hey, that looks just like mine!
What is the value in Ohms for that big old thing? How many watts?
Ohmite resistor - 1 ohm resistance - 50 watts power - cost 19.67
GA Architect
SILVER Star
Installed the Ohmite L50J1R0 from Mouser Electronics in 2015...10 years later, still has my fan blowing on low & high when needed.
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- #20
Thank you, I'll wait to hear back. I'm almost certain it is my resistor upon closer inspection. Cheers!
