Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
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
5,234 satisfied customers
Catman peterbilt with c15 acert. MXS why is my engine fan
catman peterbilt with c15 acert. MXS why is my engine fan always running.. i have CAT ET. what/how do i check ?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I'am working on a 2006 Peterbilt truck with a CAT engine.
Hi, I'am working on a 2006 Peterbilt truck with a CAT engine. the engine serial number is ***** The engine fan is stuck on all the time. The fan clutch uses air to disengage.I manually put air to the … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Catman I have Eng sn 6NZ63295. the engine fan is on. I look
catman I have Eng sn 6NZ63295. the engine fan is on. I look in status under cat et. The cooling fan shows on, on/off fan output j1 is off and ac high pressure is off. What can I do to get the fan to s… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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
5,234 satisfied customers
Catman, Have a problem with a 5EK not starting, not getting
Hey Catman,Have a problem with a 5EK not starting, not getting any engine speed, do not have any engine speed codes, just needing some advice Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2001 freightliner fl112 j98445 with a Cat c-12
Hello I have a 2001 freightliner fl112 j98445 with a Cat c-12 2ks64404. Engine cooling fan stays running all the time. So far I have manually applied air to supply on Horton clutch it disengages. No a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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
5,234 satisfied customers
I have a 2003 379 with a c-15. my problem is there is no power
I have a 2003 379 with a c-15. my problem is there is no power to the engine fan solenoid. fan runs all the time. Checked all fuses and wiring , everything seems ok. Any suggestions?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Cat Man, I have a KCB25071 that the engine fan stays on all
Cat Man, I have a KCB25071 that the engine fan stays on all the time. What all inputs will cause the fan to come on? The a/c pressure is off, the manual on/off works, fan output is off. circuit works … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Cat Man I have a 1LW that isnt turning on the cooling fan when
Cat Man I have a 1LW that isnt turning on the cooling fan when the a/c sends the signal to. I can make the solenoid come on with the diag test can I change something in my config to fix this?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
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
5,234 satisfied customers
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
5,234 satisfied customers
I have a 2000 pete with a C-12 ESN-2ks11381 the engine fan
I have a 2000 pete with a C-12 ESN-2ks11381 the engine fan isn't working at all. with et i can see the manual fan switch on off is working but the fan output stays off. is there a parameter that is ca… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
On a 98can pete with a 1lw 3406e the fan wont go off unless
On a 98can pete with a 1lw 3406e the fan wont go off unless i pull relay. I can run coing fan output driver test with et and relay switches and fan goes off. If i take relay out and run a/c the fan cy… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2004 peterbilt with a c-15 engine. When the outside
I have a 2004 peterbilt with a c-15 engine. When the outside temperature goes below a certain temperature like -15 celsius the engine fan engages and won't go off. What would cause this to happen?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
Hello.. Do you have the the engine fan wiring diagram for a
Hello.. Do you have the the engine fan wiring diagram for a 2007 international with a c15? Truck VIN# XXXXX engine Ser.No MXS75083… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 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
5,234 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

Certified Truck/Bus Technician

4,361 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x