Fan switch question
#1
Fan switch question
I want to replace my cooling fan switch on my '89 IROC with one that comes on sooner than stock. I found one at JET Performance Products that is $60 just for the sensor that goes into the head. Anyone know of another place to get one for a more reasonable price?
#3
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Location: Houston, TX
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Car: 87 T/A
Engine: 350 TPI
Re: Fan switch question
I just checked it out as I'd like to replace mine to. One come on at 200 and goes off at 185. The other goes on at 176 and off at 166. I assume the 200/185 would be the way to go?
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Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Re: Fan switch question
AC Delco D1855B (or equivalent) fan switch. 210-215°F on/200°F off, so it'll work with the stock thermostat. $18
A duralast (autozone) equivilant is about $9.
A duralast (autozone) equivilant is about $9.
#6
Re: Fan switch question
Thanks for the replies. I'll check out these different options. The service manager at my local GM dealership told me that the stock switch doesn't turn fan on until over 230 degrees. 200 would be much better.
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#8
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Car: 87 T/A
Engine: 350 TPI
Re: Fan switch question
Well I guess I am not putting a new fan switch on. I checked it out and the switch is only for dual fan set ups. Mine is a single fan. I guess it doesn't matter though, being a single fan it comes on with the a/c, if I am not using the a/c here in Houston, then my car isn't running hot anyways lol.
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#11
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Car: 87 Formula/ 00 Xtreme
Engine: TPI 305/ v6
Transmission: struggling t-5/ 4l60E
Axle/Gears: 3.08/ 3.23
Re: Fan switch question
The v6, the fan switch was a redundant control for the fan. Meaning, if the ECM didn't turn on the fan, the fan switch would eventually.
IIRC, the iron dukes (4cyl), though fuel injected, still had a clutch driven fan.
That leaves crossfire and L69 motors which, I am not sure what kind of fan they had without doing some searching.
I have an '87 Helms manual. The S, F, H and 8 vin code all use a fan switch in one way or another.
Admittedly, there may be a single fan setup that is ECM only controlled but, I don't see it anywhere. Not to say I haven't overlooked it as well.
Regardless, the fan switch was not exclusive to dual fans.
Last edited by deadbird; 07-16-2009 at 12:05 AM.
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