Hi all,

I have an f20b swapped to my CD and my radiator fans are not turning on, but when i turn on my A/C it does turn on so im sure the fans and wiring is working fine. I'm trying to find where the thermoswitch for this one but i can't find it anywhere does this engine have one? or the fans are computer controlled, i check the temp from my OBD2 scanner the engine temp is already at 88C degrees(around 190F) but still the fans are not running.

 

What year is this ECU and engine?

When the ac is on, are BOTH fans running?

 

just hook it up to a switch for now

 

Do you not like to fix things? Personally, "hook it" _PS there are two fans_ to a switch, not what I would do.


OP-Fairly simple system IMO, I would repair so it functions as designed.

 

on the head it says 97, the ECU is already OBD2a it came from accord CF chassis.

Yes both fans are running when ac is on.

 

Ok, sounds like thermo a (coolant switch a) is on vacation.....I and another member wrote something up. It was for a 4th gen (the 97-5th gen is much the same-just a few wire colors, fuse amp differences, switches close at slightly different temps)

Around post #8
https://honda-tech.com/forums/honda-accord-1990-2002-2/questions-regarding-radiator-fans-2989671/

EDIT: This pic is for a 5th gen....so you can follow the minor differences.

 

Hey thanks for this diagram! i'll do this on the weekend :D