[Suubie_wrx]

Hey guys, i have a 2011 Subaru WRX sedan and it keeps overheating whenever it rains, anyone have any idea what it could be? I noticed that the lower rad hose where the thermostat is, stays closed when it does overheat, which makes sense, but i still dont know why it only happens when it rains. Ive already replaced the thermostat and flushed my coolant, the problem is still there, any help would be great.

 

[JaySin]

I had this happen on an old car of mine...not a Subaru(Chrysler). Replaced the water pump and power steering belt. Problem solved. Although I don't recall which actually fixed the problem. Maybe your belt is loose/worn and slips?

 

[SD_GR]

Wet the temperature sensor and all exposed wiring to/from it while the engine is running and see if you can replicate the problem.