Hi, I have a 95 honda civic. I had my temp spike up suddenly once in a while... 2 months later my radiator broke down. I had the radiator changed. car drove ok for a week or so then started spiking up on heat.... going to max. The only way i could control it is by turning on the interior heater to max. as i turn heater to max the temp begins to climb back. Then i changed the thermostat (drained fluid). It ran a little better..... less spikes. But now it's almost predictable. if i drive on highway wihtout turning on my interior heater the heat will climb to max. again i have to turn on heater to max to cool it down to normal (half way). I really need help to suggest me what could this be?? The fan is working when i short the wire going to temperature switch. Also if the temp goes up 3/4th i do see the fan running. anyone with ideas?? I am dreaded that i may need to run heater during summer. help me pls. shamNOSPAMsdewan AT hotmail DOT com