Radiator Fan stuck on

Nooree01 · 08-24-2019, 09:43 PM

So I left work and drove the car spiritually for 20 min no ac the whole time and I came to a stop , I realised my radiator fans are running I was surprised, so I pulled up my obd and water temps are at 180 which is not bad and I turn off the car and when the car is on "on" with engine not running the fans are still running. Really concerned it could f**k up my cooling system.

Any idea what's going on?

Thanks for the help

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fryzia23 · 08-24-2019, 09:57 PM

Most likely your radiator fan control module is shorted, you can pick one up cheap off of ebay

Nooree01 · 08-25-2019, 09:00 PM

Quote:

Originally Posted by fryzia23

Most likely your radiator fan control module is shorted, you can pick one up cheap off of ebay

You think it's bad to drive the car for a few days till I get the module

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JARblue · 08-25-2019, 10:00 PM

Shouldn't hurt it. Especially if the weather is warm and the car needs the fans on anyway.

Nooree01 · 08-25-2019, 10:06 PM

Quote:

Originally Posted by JARblue

Shouldn't hurt it. Especially if the weather is warm and the car needs the fans on anyway.

Thanks

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nis350 · 08-27-2019, 12:22 AM

no issue... the thermostat regulates the coolant temp. in the engine. the fan only cools the hot coolant in the radiator. with the fan on, it is like driving the car at highway speed.

Quote:

Originally Posted by Nooree01

You think it's bad to drive the car for a few days till I get the module

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ethan_goode · 12-10-2020, 04:11 PM

I'm having this issue right now and the dealership wanted to charge over $1500 to swap the IPDM. Do I need to completely swap it or can i just change the relay? Mine are running all the time.

JARblue · 12-10-2020, 09:59 PM

Dealers are money grabbers. Get a second opinion

BettyZ · 12-10-2020, 10:53 PM

Quote:

Originally Posted by ethan_goode

I'm having this issue right now and the dealership wanted to charge over $1500 to swap the IPDM. Do I need to completely swap it or can i just change the relay? Mine are running all the time.

It would actually be cheaper (and better!) to buy an ECUtek tune from Seb and have him fix it. He'd also tune your Z, which is a huuuuge win-win.

ZoomZ · 12-11-2020, 02:08 PM

Quote:

Originally Posted by Nooree01

So I left work and drove the car spiritually for 20 min no ac the whole time and I came to a stop , I realised my radiator fans are running I was surprised, so I pulled up my obd and water temps are at 180 which is not bad and I turn off the car and when the car is on "on" with engine not running the fans are still running. Really concerned it could f**k up my cooling system.

Any idea what's going on?

Thanks for the help

Sent from my SM-G975U using Tapatalk

Do they shutoff automatically after leaving ignition in "ON" position for a while? If they do, this is normal.

The Thermostat opens at 170F and send fluid to radiator. Closes at 160F and just circulates water.

If you are reading 180F, it's at the coolant temp sensor which is in rear water piping. Not temp in radiator.

Your obviously getting power but if doesn't shutoff, then you could have a stuck FAN control relay (easy to check and/or replace) IT gets signal from IPDM and ECU.

If nothing else is acting up, I would defer the IPDM and ECU until you check cheap easy stuff. ( Relay and coolant temp sensor and fan control module)

ZZ

Spooler · 12-11-2020, 02:52 PM

What he said^^^^^^^^.

08-24-2019, 09:43 PM	#1 (permalink)
Nooree01 Base Member Join Date: Sep 2018 Location: Kansas City, MO Posts: 108 Drives: 2011 370z Gray 7AT Rep Power: 7	Radiator Fan stuck on So I left work and drove the car spiritually for 20 min no ac the whole time and I came to a stop , I realised my radiator fans are running I was surprised, so I pulled up my obd and water temps are at 180 which is not bad and I turn off the car and when the car is on "on" with engine not running the fans are still running. Really concerned it could f**k up my cooling system. Any idea what's going on? Thanks for the help Sent from my SM-G975U using Tapatalk

08-25-2019, 10:00 PM	#4 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	Shouldn't hurt it. Especially if the weather is warm and the car needs the fans on anyway. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

12-10-2020, 09:59 PM	#8 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	Dealers are money grabbers. Get a second opinion BettyZ likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

12-11-2020, 02:52 PM	#11 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,900 Drives: 2013 Nismo 370z Rep Power: 2684392	What he said^^^^^^^^. ZoomZ likes this.

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08-24-2019, 09:57 PM	#2 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1246	Most likely your radiator fan control module is shorted, you can pick one up cheap off of ebay

12-10-2020, 04:11 PM	#7 (permalink)
ethan_goode Base Member Join Date: Aug 2020 Location: Texas Posts: 7 Drives: 11 Nissan 370Z GM M6 Rep Power: 5	I'm having this issue right now and the dealership wanted to charge over $1500 to swap the IPDM. Do I need to completely swap it or can i just change the relay? Mine are running all the time.