How do you test a fan solenoid?
An easy test for the function of the solenoid only is to start the truck, let it run and wait for the fan to disengage when air pressure builds to normal. If you then shut the truck off, which kills power to the solenoid, you should immediately hear the solenoid vent the air that is in the line going to the clutch.
How do you tell if your fan clutch is not working?
Symptoms of a Bad Fan Clutch
- Engine overheating at low speed or when stopped is the most-common fan clutch failure symptom.
- Insufficient heat in winter is another common problem but caused by the opposite fan clutch failure.
- Excess fan noise at high speed is caused by the same problem, a seized fan clutch.
What does a bad fan clutch sound like?
Another common symptom of a faulty fan clutch is excessively loud cooling fans. This may result in an excessively loud engine from the fan blowing at full speed. The sound may be easily audible and present at all times when the engine is cold and hot.
What are the signs of a bad clutch fan?
Symptoms of a Bad Fan Clutch
- Engine overheating at low speed or when stopped is the most-common fan clutch failure symptom.
- Insufficient heat in winter is another common problem but caused by the opposite fan clutch failure.
- Excess fan noise at high speed is caused by the same problem, a seized fan clutch.
What happens to the fan on a Cummins ISX?
If it fails fan stays on Hshappy2 Thanks this. There is a switch on the front end of the engine that is air actuated. If it fails fan stays on Click to expand… 77fib77 Thanks this. This is the best job I have had.
How often does the engine fan stay on?
Discussion in ‘ Trucks [ Eighteen Wheelers ] ‘ started by tkilby, Jun 23, 2010 . 05’ Pete 379 with a Cat ACERT: The last few day’s the engine fan has been staying on 90 % of the time. The air solenoid on the firewall has no power and the manual rocker swich has power only on one side “the yellow/orange wire”.
Why does my ISX truck won’t start?
I took the truck to my regular mechanic to have a full service done, and after they replaced all the fuel filters, it woudln’t start over their pit. (the primer pump was whirring away everytime i turned the key to the on position) Long story short, they diagnosed it as a bad high pressure pump.
What to do if your engine fan stops?
Unplug the swtich and put a jumper wire on it and if the fan stops you found your porblem. They can go bad and make the fan stay on even with the A/C off. tkilby Thanks this. Jumped the A/C high pres. switch and the fan still runs…..??? may take it to Pete dealer tomorrow. I had a loose wire on the a/c freon temp relay.