[smascarenas]

Not sure if anyone else is having the same problem Im having but here goes. The radiator fan will not turn on when I turn on the AC.
I have replaced the temp sensor, radiator fan and fan relay and still doesnt come on. Any ideas?

 

[l33ch]

Um....Granted, I'm a little stoned right now, but doesn't the radiator fan only turn on when the t/stat opens and/or when the car engine reaches a certain temperature? I thought the radiator fan was a "substitute" for when the car is not in motion to blow air over the radiator--keep from overheating? I thought that's it's the blower motor that forces air through the vents?

Or, are you saying that when the car is running at operating temp, parked, with the a/c running, that the car radiator fan will never turn on?--Sorry just want to understand the issue better.

read: http://caphector.com/atoyota/techin...2toypdf/02rmsour/2002/02echorm/co/ecf/ovi.pdf
http://caphector.com/atoyota/techin...ypdf/02rmsour/2002/02echorm/co/ectsw/insp.pdf
http://caphector.com/atoyota/techin...toypdf/02rmsour/2002/02echorm/co/cfr/insp.pdf

 

[smascarenas]

I was under the assumption that the cooling fan was supposed to come on when the AC was turned on. I have now tested it at all temps and still nothing. Thanks for the documents, they will be helpful.

 

[l33ch]

hmm....I might have to test that on my echo...but currently it's soaking wet . Took seats out and hosed them down and scrubbed with simple green--they are drying right now.


To the best of my knowledge--and I could be wrong on this, is that the radiator fan is independent of the air conditioning. I know on my corolla, the radiator fan doesn't kick on (with a/c going on not) until about 1-2 minutes parked on a warm day (for example coming back from the store). So if i come home, keep the car running, the a/c is going..the radiator fan will not come on until maybe right as I get out of the car to open the gate..then I'll hear the fan kick on and whirl up...runs for about 20 seconds or so then shuts off for a minute or so..then kicks back on again.

* I would go for a drive...get the car nice and warm. Come back home, put it in park/neutral w/ parking brake..and chill for a few moments--do this on a warm day--and see if the radiator fan kicks on or not. Try it with the a/c running and not running.Those links will show you how to test the fan bypassing the t/stat to test functionality. If you go up on the path/URL on that service manual link it will get you to the table of contents.

Please let me know how it works out--and good luck!

Love live the Echo!

Keep me posted.

 

[dustyyp]

did you check the fuse box? had this problem, didn't even think to check the fuse... blown. don't think the radiator runs when AC is on. only experienced issues after the winter when it got hot and i was overheating

 

[dustyyp]

just started my echo and turned on the ac... rad fan does start up at any temp with AC on. check the fuse.

 

[smascarenas]

Went for a drive and still nothing. I made it warm enough to have the red light come on, at a loss.
I was thinking of hard wiring it right to the fan with a switch, what do you think?

 

[smascarenas]

I checked the fuse and even replaced a good one just to see.

 

[l33ch]

check the #1 and #3 links. it will have you test out the relay and ECT connector. I think it says it should rotate if the ECT switch (engine coolant temperature switch) is disconnected. If the fan doesn't rotate, per manual, " check the fan main relay, cooling fan relay, cooling fan,
fuses, and check for short circuit between the cooling fan relay
and ECT switch."

 

[l33ch]

just started my echo and turned on the ac... rad fan does start up at any temp with AC on. check the fuse.

Thank you! I had no idea! I guess I never really noticed it. My other car you totally can hear it kick on.