I have check engine code 1491 radiator fan control relay circuit open or shorted. Will the fan still work if there is an open circuit? Does it mean the fan is running all of the time? I think I hear the fan but it is kind of hard to see. The van has not been over heating. By the way, the AC does not work. I was told it needs a new compressor. I'm just stating this in case it has something to do with this code. Anyway I need help. Please tell my what to do. Thank you.