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COOLING FAN 94 DODGE GRAND CARAVAN


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nomadd
User

Jun 1, 2017, 2:30 PM

Post #1 of 15 (511 views)
COOLING FAN 94 DODGE GRAND CARAVAN Sign In

i think i have a 2 speed cooling fan. how can i check it to make sure the high speed is working ? i've never heard it kick on. whenever i open the hood it seems like the engine is too hot ?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 1, 2017, 2:46 PM

Post #2 of 15 (507 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

Seems like the engine is too hot? You need to be a whole lot more precise than that. These engines are programmed to run as high as 230 to 235 degrees.

It will rarely ever require high speed for temp reasons. Low speed is usually sufficient for temp control.

The thing that will usually trigger high speed is if the AC pressure gets too high.

We use a scan tool to verify these things.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Jun 1, 2017, 3:39 PM

Post #3 of 15 (498 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

Of course it seems hot when you just open a hood on a warmed up engine with any fan on it blows up at you instead of down and out with hood closed.


Just look for warnings of overheat and do pay attention. They get warm as like many there's no room with everything jammed in such small place,


T



nomadd
User

Jun 2, 2017, 8:17 AM

Post #4 of 15 (476 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In


In Reply To
Seems like the engine is too hot? You need to be a whole lot more precise than that. These engines are programmed to run as high as 230 to 235 degrees.

It will rarely ever require high speed for temp reasons. Low speed is usually sufficient for temp control.

The thing that will usually trigger high speed is if the AC pressure gets too high.

We use a scan tool to verify these things.



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2017, 8:21 AM

Post #5 of 15 (474 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

If you're using a REAL scan tool then that gives you all the info you need. It will tell you the actual temp. It will tell you which fan is requested and it will tell you what the AC high side pressure is.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nomadd
User

Jun 2, 2017, 8:21 AM

Post #6 of 15 (472 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

ok so how does ac pressure have an effect on engine temperature ?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2017, 8:24 AM

Post #7 of 15 (470 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

Who said it does?

Temperature is not the only thing that fan controls. It pulls air across the AC condenser which condenses the gas to a liquid and reduces the head pressure.

You appear to be looking for a problem where there isn't one. You have no issues to give concern to fan speed.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



nomadd
User

Jun 2, 2017, 8:33 AM

Post #8 of 15 (466 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

you did ! "the thing that will usually trigger high speed is if ac pressure gets too high"


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2017, 8:38 AM

Post #9 of 15 (464 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

This is just going in circles.

The fan regulates not only engine temp but AC pressure. Certain situations will increase AC pressure and the fan is programmed to kick in at that point and that is far more likely to happen that for temp reasons.

Unless you have some symptom that you haven't divulged yet, this should end here with no issue.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jun 2, 2017, 10:51 AM

Post #10 of 15 (454 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

You never stated which engine this has.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Jun 2, 2017, 10:54 AM)


Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 2, 2017, 11:26 AM

Post #11 of 15 (446 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

If you forced this to work like blocking air till it really did get hot you know it worked without more than cardboard. That you would risk a real overheat and damage for a problem unknown to exist at all.


Said up top, it barely should need more than the low setting unless it's VERY hot out, your A/C working real hard at lower MPH.
Are you having any problems or just bored to find out? Don't without a problem IMO,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2017, 11:32 AM

Post #12 of 15 (442 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

He has given no reason to even be suspicious of this so this whole thread is for nothing.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jun 2, 2017, 11:41 AM

Post #13 of 15 (436 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

Wrong season but this is almost like testing how cold a metal flag pole is with your tongue when you already know it's super cold. If you never saw that great. If you did that no explanation would do,


Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 2, 2017, 11:46 AM

Post #14 of 15 (432 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

His last question was a constant complaining fiasco too.

I'm probably going to close this soon if it doesn't change path.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jun 2, 2017, 12:30 PM

Post #15 of 15 (424 views)
Re: COOLING FAN 94 DODGE GRAND CARAVAN Sign In

If he wanted to test the high speed operation, he could ground the radiator fan switch. Don't ground the coolant temperature sensor for the computer.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.






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