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2000 freightliner classic fan won't shut off. Put a new temp
2000 freightliner classic fan won't shut off. Put a new temp switch in block new air Solenoid solenoid. We have no power at air solenoid or both low or high a/c switches , but a/ works. All breakers h… read more
Mike Mcmillan
Mike Mcmillan
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On my 2006 KW T600 - my fan is on all the time. I have no
On my 2006 KW T600 - my fan is on all the time. I have no power to the A/C clutch, and no power to either a/c pressure switch. I have completely dismantled the wiring harness & fusebox, but it is ok. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I have a CAT C12 and the Fan doesn't turn on automatically
I have a CAT C12 and the Fan doesn't turn on automatically only when I turn it on manually. However it does turn on automatically when the AC is on … read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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I'm working on a 2005 w900 with a cat c15, i have a code for
I'm working on a 2005 w900 with a cat c15, i have a code for the oil pressure control valve and the engine fan is stuck on. Could that valve be keeping the fan on if it's bad? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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My engine fan will not turn on. Either with the manual
My engine fan will not turn on. Either with the manual switch or just letting the ecm do it by water temp. I've replaced the fan air solenoid and it still will not engage. Unless I cut the wires to th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
Cat Man, I have a C12 Cat s/n ALS00353 engine fan is staying
Cat Man,I have a C12 Cat s/n ALS00353 engine fan is staying on all the time, I do have power coming from pin 28 but it is 11.7 volts, when I put a load on it like the fan solenoid I loose voltage, I d… read more
Cat Man
Cat Man
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2003 western star with a c-15 cat. engine fan runs
2003 western star with a c-15 cat. engine fan runs continuously. only 2.5 volts at fan solenoid it works properly when 12 volts are supplied manually. ecu is commanding fan on. new high pressure trans… read more
Cat Man
Cat Man
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Vocational, Technical or Trade Scho
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T800 2002 c12 the engine fan is always on i check de
T800 2002 c12 the engine fan is always on i check de selenoid and its work perfectly the reading of the temparature work great to but i need to know if its have a nother sensor for the cumputer ?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
99 385 peterbuilt. 99 peeterbuilt 385, c12 cat. 99
99 peeterbuilt 385 , c12 cat engine i need engine fan control wiring diagram, both mechanical switched and ECM conrolled. mechanical switched side working, auto side not working. vin# ***** … read more
Daniel Wilson
Daniel Wilson
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Working on a 3406e 5ek in 1996 379 pete, eng fan running all
working on a 3406e 5ek in 1996 379 pete, eng fan running all the time, check wiring and fuses and relays all seem to b ok, on the plug that goes on the manual o/r switch in cab all the wires are hot i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2003 Kenworth T600 VIN 1XKADB9XX3J705296 with a Cat
I have a 2003 Kenworth T600 VIN 1XKADB9XX3J705296 with a Cat engine. We recently had all the belts replaced. The driver reports the motor fan is running continuously, whether the fan switch is in manu… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2008 peterbilt 389 with a cat 6nz motor. My engine
I have a 2008 peterbilt 389 with a cat 6nz motor. My engine fan keeps turning on every 10 min and staying on for 5-10 min at a time. Coolant temperature is fine. Any idea what could be causing this?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
Cat man. I have a c15 that will not engage clutch fan when
Hello cat man. I have a c15 that will not engage clutch fan when coolant temp reaches high temp. Fan will come on manually with switch and comes on with a/c. Temps climb to atleast 220. New temp switc… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
Mr. Cat Man, I'm having some trouble with the fan staying
Mr. Cat Man, I'm having some trouble with the fan staying on, on a C12. My ESN is MBL01285. I've checked the fan clutch and it seems to be working properly. Can you tell me anything about this circuit… read more
Cat Man
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put bxs engine converted t9o 6nz in 97 pete everything seems
put bxs engine converted t9o 6nz in 97 pete everything seems to be fine except the fan let me explain with the engine harness disconnected I have power on both sides of the ac system also both sides o… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
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I have a 2003 international 9200I with a C12 and the fan doesn't
I have a 2003 international 9200I with a C12 and the fan doesn't turn off. It has a fan override switch also. I used international on command to trouble shoot the issue. Going through the steps I got … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
I have a 2001 w900 kw with a c15 475h cat engine. The problem
I have a 2001 w900 kw with a c15 475h cat engine. The problem I'm having is that the fan runs practically all the time. When it does shut off it only stays off for about 10 to 15 seconds and then come… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
sensor power feed problem , 5 volt at plug for temp sensor
my fan hub working all time, put power to pin 11 at ecm : fan hub stop....need check :sensor power feed problem , 5 volt at plug for temp sensor but when plug sensor i lost the 5 volt , cat c12 : kent… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,237 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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