Radiator Fan

NASEERNJAN

MEMBER
2000 MITSUBISHI GALANT
2.4L
4 CYL
2WD
AUTOMATIC
144,000 MILES

Works only with heat turned on.
When heat turned on, could see the two speeds (HI/LO) both working fine.

However, fan does not work without the heat (AC) switched on.
Neither Hi, nor low fan.

So, without car heating turned on, the heat gauge goes up near the red zone.

6 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,526 POSTS

Hello,

It sounds like you may have a bad fan controller, here is a wiring diagram and a guide to help you get the problem fixed.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Please run some tests and get back to us so we can continue helping you.

Best, Ken

Image (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

Monday, March 27th, 2017 AT 3:38 PM

NASEERNJAN

MEMBER
5 POSTS

Thanks ken. Plan on changing control asap. Hope it is an easy replace. Checked fuse n relays. All good

Was this

answer

helpful?

Yes

Sunday, April 23rd, 2017 AT 5:39 AM

KEN L

MASTER CERTIFIED MECHANIC
47,526 POSTS

Please let us know what happens.

Cheers, Ken

Was this

answer

helpful?

Yes

Monday, April 24th, 2017 AT 9:17 AM

NASEERNJAN

MEMBER
5 POSTS

Hi ken. Shall keep u posted. Ordered the parts. Maybe within a week's time will have a reply.
So, I have ordered radiator and radiator fan assembly (comes with controller and fan).
Thermostat was replaced recently.

Was this

answer

helpful?

Yes

Tuesday, April 25th, 2017 AT 4:54 AM

NASEERNJAN

MEMBER
5 POSTS

So, the coolant temperature is being regulated well and no heat ups.
Waited long to test this on a hot day.
My last test will be to see it with air conditioning turned on and a hot day. For now I'm good.
It did take the car days to gradually adjust to a new radiator and a new cooling fan assembly. And during this time there were times things notched up on heat.
Have a good one!