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Guntrader
In Memoriam
Location: Mukilteoish
Joined: Sat Mar 26, 2011
Posts: 11595
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How does the heater fan in in a 2002 Silverado regulate fan speed?
Resister block, separate windings, or voltage regulator?
Mine stopped working on high, and now only works from 1-4.
I doubt it's a voltage regulator so guess I need either a new fan motor or resistor block.
Thanks in advance.
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NRA Endowment Member. How did they know my member was well endowed?
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| Fri Feb 01, 2019 3:07 pm |
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Free Boer
Site Supporter
Location: centralia
Joined: Mon Feb 13, 2012
Posts: 1352
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Is your system manual control or automatic temperature control?
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| Fri Feb 01, 2019 3:19 pm |
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WaJim
In Memoriam
Location: Tacoma Wa
Joined: Tue Oct 8, 2013
Posts: 16607
Real Name: George Bailey
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Resistor block....OEM 47 bucks
Aftermarket are ok though
Sometimes the harness gets baked at the resistor....crispy/bad connection.
Just checked my parts supplier...they make a harness/resistor kit...
Dorman Part # 973-409
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| Fri Feb 01, 2019 3:27 pm |
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Peckerinak
Site Supporter
Location: Yelm
Joined: Sun May 19, 2013
Posts: 744
Real Name: Ted
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Typically it blowing out the resistor block is that the fan is bad.
Takes more juice than it should to do the speeds and blows the block.
Can replace the resistor block.
More than likely will go out again soon.
So fan will be next.
It’s a 40 buck gamble for you.
I’d do both.
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| Fri Feb 01, 2019 7:03 pm |
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PMB
In Memoriam
Joined: Wed Mar 6, 2013
Posts: 12018
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Moved to DIY.
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| Fri Feb 01, 2019 7:08 pm |
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SPLATT
Location: Tacoma
Joined: Tue Oct 30, 2012
Posts: 391
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Mine does the same exact thing and I still have to fix it. I've been told the the highest speed is usually a problem with the switch not the resistor because the highest speed isn't ran through a resistor but directly powers the blower fan.
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| Fri Feb 01, 2019 10:14 pm |
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Jeffro
Site Supporter
Location: Camano Island, WA
Joined: Fri Mar 18, 2011
Posts: 740
Real Name: Jeff
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My solution
Buy a new/ newer truck
Yours is 17+ years old
This is just the beginning of stupid little breakdowns
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The Dude Abides
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| Sat Feb 02, 2019 10:19 am |
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Jeffro
Site Supporter
Location: Camano Island, WA
Joined: Fri Mar 18, 2011
Posts: 740
Real Name: Jeff
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I’m shopping today to replace my 2015
Before SHTF
LOL
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| Sat Feb 02, 2019 10:22 am |
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SPLATT
Location: Tacoma
Joined: Tue Oct 30, 2012
Posts: 391
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Jeffro wrote: My solution
Buy a new/ newer truck
Yours is 17+ years old
This is just the beginning of stupid little breakdowns Not everyone has that option. Replacing mine with a newer equivalent would cost at least 3 times what I paid for my current truck.
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| Sat Feb 02, 2019 11:07 am |
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