2008 F150 4.6L Electric Cooling Fan runs all the time - even with AC OFF. If I disconnect the fan clutch electrical connector, the fan runs several more minutes before "freewheeling".

Asked by Apr 07, 2016 at 04:45 PM about the 2008 Ford F-150 XL SuperCrew SB

Question type: Maintenance & Repair

How can I narrow down the cause of the "stuck" cooling fan clutch?

4 Answers

22,110

Can you clarify, please? Are you saying when you remove the electrical connection from the fan, it somehow is still receiving electrical power, and operating?

22,110

At any rate, if the clutch on the electronic fan stays engaged when the electrical connection is disconnect, I suspect there is a mechanical malfunction with the clutch itself (within the fan mechanism). I know of no serviceable parts to the unit, other than replacing the entire electronic clutch mechanism. Motorcraft brand will set you back about two hundred bucks. Off brands, maybe 120 bucks or so.

1 of 1 people found this helpful.

I appreciate your taking time to answer my question. If I disconnect the electrical connector for the clutch fan, it takes a few minutes, but it does disengage. If the connector is connected, the fan runs all the time. To make sure I am clear, it is a mechanical fan, but uses an electric (PCM controlled) fan clutch. So, it might be: PCM glitch, or sending unit failure, or mechanical clutch "sticking".

22,110

You will have to do a little research for your particular make and model vehicle to see when and how the clutch is engaged. I would suspect switching is determined by the temp control sensor usually mounted somewhere around the thermostat housing or manifold. Normally the fan does not come on when the engine is cold, like the first thing in the morning. This facilitates the engine coming up to operating temperature, which is critical in today's engines. If you locate the temp control sensor, try unplugging it first thing in the morning and see if the fan clutch engages. If it does, then the problem is not there. If it fails to engaged with the sensor disconnected, the sensor may be faulty.

1 of 1 people found this helpful.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 230,783 nationwide F-150 listings starting at $1,300.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    9,980
  • #2
    dandyoun
    Reputation
    4,690
  • #3
    tennisshoes
    Reputation
    3,450
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,716 Great Deals out of 158,224 listings starting at $1,850
Used GMC Sierra 1500
1,100 Great Deals out of 61,833 listings starting at $1,295
Used Ford F-250 Super Duty
433 Great Deals out of 47,782 listings starting at $1,700
Used Toyota Tundra
630 Great Deals out of 35,968 listings starting at $1,500
Used Dodge Ram 1500
312 Great Deals out of 10,752 listings starting at $1,950
Used Toyota Tacoma
565 Great Deals out of 40,827 listings starting at $2,995
Used Ford Mustang
348 Great Deals out of 41,846 listings starting at $1,488
Used Ford F-350 Super Duty
397 Great Deals out of 27,118 listings starting at $3,900
Used Ford Explorer
1,075 Great Deals out of 67,913 listings starting at $1,200
Used Nissan Titan
335 Great Deals out of 21,949 listings starting at $1,995
Used Chevrolet Colorado
324 Great Deals out of 43,329 listings starting at $1,299
Used Chevrolet Tahoe
832 Great Deals out of 40,285 listings starting at $1,900
Used Chevrolet Silverado 2500HD
424 Great Deals out of 31,843 listings starting at $2,500

Used Cars For Sale

2018 Ford F-150 For Sale
12 Great Deals out of 144,064 listings starting at $19,455
2017 Ford F-150 For Sale
229 Great Deals out of 13,835 listings starting at $18,450
2016 Ford F-150 For Sale
206 Great Deals out of 7,820 listings starting at $16,998
2015 Ford F-150 For Sale
433 Great Deals out of 10,812 listings starting at $11,990
2014 Ford F-150 For Sale
665 Great Deals out of 14,217 listings starting at $7,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.