Engine fan stuck in low speed

[jcain]

No rhyme or reason or mods done at the time. Engine cooling fan seems to be stuck on low speed non stop.

Trucks Temps are 190s
Outside Temps are 70s
A/c is not on
Coolant level is good
Radiator is not obstructed
Fan is on on cold start and warm start
No dtc (codes)

Any tests I can do relatively easily ? I'm a long ways from home and have minimal tools and no IDS

 

[sootie]

Someone else posted their fan doing something wacky when they tuned with ez lynk....

May not be related tho

 

[6.0 Tech]

Try turning it by hand with the engine off. I have seen one fan that was seized, it was on high, but yours may have some slippage still.

 

[jcain]

It spins by hand but has resistance

 

[powerstroked08]

It should have some resistance. It's a visoelectric fan. Should feel like your turning it under water if that makes sense.

 

[ghohouston]

One of our service trucks did exactly the same, new fsn clutch and all wss well.

 

[jcain]

Was the fan clutch
Guess they still have problems with them seizing up

 

[Dzchey21]

Yeah out dealer stocks them and one service truck got one this summer