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Old 12-02-2019, 07:50 PM   #1
Dbordenb

Name: Dbordenb
Title: Green Behind the Ears
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Join Date: May 2014
Location: Annapolis, MD
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Fan clutch testing

Iím suspecting a bad fan clutch on my 2014. The AC compressor seems to cycle on and off a lot and I donít ever hear the fan engage and get louder.

The fan will spin with engine off but has a good bit of resistance. With the engine on I can stop the fan with my hand. I turned the AC on max and lowest temp and waited a minute for the fan to increase speed and it never did and I could still stop the fan by hand.

Does it sound like I need a new clutch?
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2014 CCSB 2500 Laramie Longhorn
SOLD-2003 Quad Cab, 48re, Second Gen swap 64mm turbo, BMS injectors, Hamilton Cam, port and polished head, ARP studs
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Old 12-03-2019, 08:08 PM   #2
RD TRCTR
 
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Was any work recently completed? Like water pump recall resolution?

I would check the pins of both sides.

Using the AC should engage the fan. You can also use a good scanner to engage the fan.
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Old 12-04-2019, 08:45 PM   #3
Dbordenb

Name: Dbordenb
Title: Green Behind the Ears
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Quote:
Originally Posted by RD TRCTR View Post
Was any work recently completed? Like water pump recall resolution?

I would check the pins of both sides.

Using the AC should engage the fan. You can also use a good scanner to engage the fan.
I didnít do any recent work on the water pump and when I checked the vin it doesnít show that recall open so I think it must have been completed before I got the truck.

I didnít try to engage the fan with a scanner but I did monitor the fan RPM and clutch PWM % and the RPM did respond to the PMW increases. It didnít spin crazy fast but it did respond. Itís been cold here, about 38 the other night and then 45 when I recorded the gauges, so Iím guessing thatís why itís responding the way it is.
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