hello,

this is my first post. i am having bad trouble with my civic trying to overheat. so i started looking into it and found that bouth the radiator and condensor fans are not working. so i then checked all fuses and relays. then changed my thermostat and thermo switch to be safe. still nothing. anyone have any other ideas?????

 

Make sure your coolant is full, and try bleeding the air out of the system. The switch is a wax-type switch, so the wax has to heat up for the switch to activate. If there was an air bubble, then it might not activate the switch. So get the air out, fill it up with coolant, and fill up the reservoir.
If that doesn't work get a multi-meter and make sure the fans are getting a current when cycle starts.

 

thanks for the reply. yes the resivor is full and i bleed the air. nothing. but neither fan runs even if the a/c is on.

 

your relays might be stuck closed. take them out and throw them on the floor and put them back in. it might free it up that what did with mine when the fan only turned on with the car off

 

It could be relays. Again, use a voltmeter to see if the fan gets current when the cycle starts. If not, then it could be a relay stuck, if the relay isn't stuck, then its going to be a little more complicated.
I had a fan motor go bad on me a few weeks ago, and I did the same thing you did: checked everything, couldn't figure it out, etc... Then I hooked it up to my $10 voltmeter from Radioshack, and I discovered that the motor was getting a current, so the motor was the problem.
You just have to figure out where the 12v current starts, and where it ends (FYI, it should end at the motor )