My Radiator fan does not want to run. Its not the stock, its a univeral flex-a-lite fan. Here comes the problem though. I disconnect the harness from thermoswitch (the switch by the thermostat) and run a bypass and the fan runs and it stays on. I think the obvious thing to do would be to change the thermoswitch. I did, but the fan still doesn't come on. The car's temp eventually start to get hot, so I would say that it overheats then. My friends and I are stump now, and we can't make out how it works with a bypass but the thermoswitch is not the problem . Any ideas?

 

water pump maybe air bubles in the system /.... i dono i was gonan say thermostat but u said thats not teh problem

 

i have the same problem. did you rewire your thermo, i had to for my swap.

 

Let me just add a couple of other things. Alright, I did a B18C swap. However, since the wiring harness was backwards, I used my stock harness (D15B8 or Civic CX). I have an ARC Thermostat.

 

Can you explain more on what you just said? It may be that or I would like to try it, at least.

 

Thank you everyone. There was air in my cooling system. We "perged" the system and all the air was coming out. Shortly after, the fan came on. Thanks again.