Neither fan working even with A/C on

[fourgsixthree33]

Last week, the engine temp was a little high. So I checked everything out and found out the radiator fan wasn't working. So I put my A/C fan back in and used the A/C button to opperate the A/C fan. I took a friend to school this morning and the engine temps were a little higher than normal. Popped the hood and noticed the A/C fan wasn't on and the switch was on.

It doesn't make any sense at all. I check the fans everytime I get out of the car before I turn off the engine. A couple days ago, both fans were on when I checked. Before that, it was only the A/C fan. Now neither are working. Any ideas? I checked all the relays, wires, etc. and everything looks fine. Even swapped out some relays.

 

[DSM_IKE]

Check your relays and fuzes. You can test the fan buy hot wiring the fan and see if it kicks on.

 

[1Bad4G63T]

I havent gotten too in depth with the cooling system on my car...all I did was swap in a blackworks radiator and some mishimoto fans and hoses...so I may be off the mark on this...is there any possibility that the car uses a thermostatic fan controller? and if so...have you checked that to make sure it's not toast?

 

[nocardick]

One of the sensor's on the thermostat housing is a temp sensor that is used to kick the fans on.It went bad on me once and mine wouldn't turn on.Check it out!

 

[turboboy4]

I would check the fuses and relays first thats the easiest check you can do

 

[1Bad4G63T]

One of the sensor's on the thermostat housing is a temp sensor that is used to kick the fans on.It went bad on me once and mine wouldn't turn on.Check it out!

^This! that's exactly what I'm talking about.

and to the other guy...he posted in his original comment that he's checked all the wiring and fuses and swapped out the relays.

 

[fourgsixthree33]

Yea I swapped out all the relays and fuses. If my coolant temp sensor is bad, why would that cause my A/C fan to not come on? I thought that only affected the radiator fan?

 

[1Bad4G63T]

sometimes things are wired wierd...again...I dont know tons about the cooling system on these cars...but it just seemed worth a shot to check that first...isnt the a/c fan inside the dash btw? I could be wrong but I dont believe the a/c draws it's air from the engine cooling system fans...none the less...in my car one fan runs constantly...as soon as I turn the key on...whoever did the wiring before I got the car must have hard wired it to an ignition relay...the other fan kicks on and off as the operating temperature changes.

 

[fourgsixthree33]

Well they have been working so far the passed few days. I dont know why they decided not to work the other day. There are two fans on the A/C. One for the radiator, and the other for the A/C. The fan on the drivers side is the A/C fan. I thought it was supposed to be on whenever the A/C switch is on? But it usually isn't. Until the car warms up. Then they both come on.

I think the wiring is messed up somewhere. But everywhere I have looked, everything looks fine.