Radiator fan blowing extremely hard but engine is not overheating

[mhandal7]

I have a 2019 Ram 1500, I bought it new in 2019 and only recently have I had this issue.
Usually when in idle position, what sounds like the radiator fan starts to ramp up really high, it almost sounds like the fan is overexerting itself, it is going way above normal speed for a fan.
The temp gauge says the trucks temperature is normal and not overheating. I've tried turning off the A/C but the fan still keeps going hard. Since I normally hear it when I am at a stop light or parked, once I start driving I can hear it even louder! Eventually it does stop but later on it will cycle back up.
I have taken it to the shop but they said there was nothing wrong with the radiator or the fan and they cannot figure out what the issue is.
Anyone else have this problem?

 

[Burla]

When does it first start, as in when does it turn on at what temp?

If coolant level is good, I'd replace the temp sensor for fun.

Almost always happen when ac is on?

.

 

[Burla]

If all up there is good, could be clutch going out. Happens pretty often on rams, I might avoid the temptation to go to v6 so called upgrade.

This first..

2012 Dodge Ram 5.7L Hemi - Coolant temperature sensor replacement

In this video I replaced the coolant temperature sending unit and cleared the engine check light in my 2012 Dodge Ram 1500 5.7L Hemi.Check out our Amazon sto...

youtu.be

 

[mhandal7]

When does it first start, as in when does it turn on at what temp?

If coolant level is good, I'd replace the temp sensor for fun.

Almost always happen when ac is on?

.

Couldn't tell you the exact temperature, but usually after driving for a while, so Im assuming engine is warm enough, but the engine temp gauge is not going over mid range. Coolant level is good, so I guess I can change the temp sensor, although I dont have a check engine light either. So who knows...

 

[Burla]

That's just a cheap option that has a decent chance at fixing it, or I wouldn't say it. Like a ten dollar part, sometimes cheaper, keep the old one. It just would suck if it you changed something else and it was this tiny thing. Clutch is a costly item, so in my thinking I like to go simple and cheap and work my way up

Even that video he had a CEL but no code, so who knows.

If you have any slime in system, that item can be off. I am a big proponent of rmi-25 once you start having cooling system issues. However, if it does end up being the fan, that doesn't have anything to do with slime in the system.

 

[crash68]

If all up there is good, could be clutch going out. Happens pretty often on rams, I might avoid the temptation to go to v6 so called upgrade.

His truck is a '19, I don't believe it has a fan driven by a belt only a PWM electric fan.
@mhandal7 what are the oil and coolant temperatures when the fan is running loud? You should be able to see the temperatures in one of the screens on the EVIC (dashboard).

 

[Burla]

There I go again bringing 4 gen stuff in 5 gen, thanks crash. I go back to where I belong

 

[mhandal7]

His truck is a '19, I don't believe it has a fan driven by a belt only a PWM electric fan.
@mhandal7 what are the oil and coolant temperatures when the fan is running loud? You should be able to see the temperatures in one of the screens on the EVIC (dashboard).

After your post I started paying attention to the temp displays. Before I was only looking at the temp gauge and that always looked normal, but no detail.
When I am driving around, coolant temp seems to stay around 200 to 210 degrees. Once I stop, whether a stop light or parked in a parking lot waiting on someone, the temp starts going up in a matter of 2-3 minutes. It goes from 208 to about 220 fast. Once it hits 222 degrees the fan starts going crazy; fast and loud. Once I start driving again, coolant temp drops back down to about 210 fairly quick and fan goes back to normal.
Oil temp is the opposite (logically), when driving on freeway it can go up to about 220, but the rest of the time (street driving or idle) it stays around the 210 range.

 

[Mojo88]

After your post I started paying attention to the temp displays. Before I was only looking at the temp gauge and that always looked normal, but no detail.
When I am driving around, coolant temp seems to stay around 200 to 210 degrees. Once I stop, whether a stop light or parked in a parking lot waiting on someone, the temp starts going up in a matter of 2-3 minutes. It goes from 208 to about 220 fast. Once it hits 222 degrees the fan starts going crazy; fast and loud. Once I start driving again, coolant temp drops back down to about 210 fairly quick and fan goes back to normal.
Oil temp is the opposite (logically), when driving on freeway it can go up to about 220, but the rest of the time (street driving or idle) it stays around the 210 range.

All of this is actually fairly normal. I also have a 2019, and I did a bunch of things to lower the ECT (engine coolant temp). My truck (at slower speeds, or stop & go traffic) would actually go over 230* sometimes!

Your stock stat is 203*, so that means engine is gonna run above that temp pretty much at all times (excluding warmup).

 

[crash68]

Once I stop, whether a stop light or parked in a parking lot waiting on someone, the temp starts going up in a matter of 2-3 minutes. It goes from 208 to about 220 fast. Once it hits 222 degrees the fan starts going crazy; fast and loud. Once I start driving again, coolant temp drops back down to about 210 fairly quick and fan goes back to normal.

Sounds about normal for a gasser, and things are working normally on your truck.
My EcoDiesel uses the same 850W PWM cooling fan but the difference with a diesel is they cool down while idling. I tell owners of EcoDiesel that if you hear the cooling fan at idle there's possibly a problem.

 

[turkeybird56]

After your post I started paying attention to the temp displays. Before I was only looking at the temp gauge and that always looked normal, but no detail.
When I am driving around, coolant temp seems to stay around 200 to 210 degrees. Once I stop, whether a stop light or parked in a parking lot waiting on someone, the temp starts going up in a matter of 2-3 minutes. It goes from 208 to about 220 fast. Once it hits 222 degrees the fan starts going crazy; fast and loud. Once I start driving again, coolant temp drops back down to about 210 fairly quick and fan goes back to normal.
Oil temp is the opposite (logically), when driving on freeway it can go up to about 220, but the rest of the time (street driving or idle) it stays around the 210 range.

I have a 2019 no e torque wat u describe is normal same thing my truck does. Gonna tell U wat I was told by my SA: quit watching the digital display like it is it. Watch the regular temp gauge. If showing normal u r ok. If that manual gauge goes up than start paying attention. He said the digital stuff is all hardwired into the BCM/ECU with it being a PWM fan it will spool up and run hard till parameters are met. All above IMHO only and wat told at dealership.

 

[Wild one]

I have a 2019 no e torque wat u describe is normal same thing my truck does. Gonna tell U wat I was told by my SA: quit watching the digital display like it is it. Watch the regular temp gauge. If showing normal u r ok. If that manual gauge goes up than start paying attention. He said the digital stuff is all hardwired into the BCM/ECU with it being a PWM fan it will spool up and run hard till parameters are met. All above IMHO only and wat told at dealership.

Think i'd tell that service writer to go take a hike with that advice.I think you're better off watching the evicc numbers then a idiot gauge

 

[turkeybird56]

I watch both lol. I keep the digital display up but SA is pretty spot on the digital just up down. PWM setup on 5th gen. Boy do I sometimes just miss reg stuff n gauges instead all these computer algorithms.

But OP describes is exactly how my 19 runs and it gets putty warm here only 93 today cool front. Just saying.

FTR. In my second 850 watt electric fan. 1st one was faulty. I had a 2 year fight to get new one.

OP: All above just my experience in my truck and IMHO. If U think U have a problem definitely get it checked out.