Rep Power: 0

Our '03' civic appears to be overheating according to the temp gauge, it fluctuates from hot to cold. The motor itself does not seem hot and there's lots of coolant. The heater even blows cool air when this occurs.
Would it be a thermostat, sensor ??? Any suggestions?

 
Rep Power: 313

You have air in the coolant system. Start by bleeding the air out. If that does not work replace your thermostat and rad cap. If that does not work get a shop to do a pressure test to check for leaks. If they can't find any leaks its probably your head gasket or water pump

 
Rep Power: 367

it's psychosomatic, this is a 9th gen 2012 civic forum, as informed in the description of the forum "In 2012 Honda released it's 9th Generation Civic. (Its not out yet!- Don't post in here!)" - they are not out yet, so you actually do not have the car, you are dreaming.

yours is a 7th gen, so please post there.

 
Rep Power: 313

Hmm, this does seem to be happening more and more often ... Unfortunatly my mod powers do not extend this far so I can't move it. I do however hope you can get your overheating issues resolved!

 
Rep Power: 367

forgot to add that the above mentioned solution is correct...
you know, good cop/bad cop play