2005 corolla problem,need some help

[Kris_j]

I've got a 2005 corolla that has issue with the cooling fan,when the ignition switch is on the fan runs immediately and constantly regardless of temperature. Any suggestions

 

[CarInOrder]

It could be the Engine Coolant Temperature sensor. Does the temperature gauge on the instrument panel work correctly?

 

[Kris_j]

Gauge works OK,also both fan relays checked ok

 

[CarInOrder]

It could also be the pressure switch (also referred to as A/C pressure switch). Here is a detailed post on debugging and part information.

 

[Kris_j]

Read the link and checked the pressure switch , which turned out to be defected ,showed continuity on all pins ,just need a new one and have
The a/c tech install it. thanks a whole lot

 

[CarInOrder]

No problem! Please throw a like my way, if you don't mind.