I have a 2002 Mazda millenia 2.5
I'm having problems with it overheating in certain circumstances, not all the time but it happens once in a while when is very hot ouside in stop and go traffic. I changed the thermostat, put plenty of 50-50 anti-freeze but that didn't fix the problem. Yesterday when the temperature needle was almost at the top I popped the hood while the engine still running with the AC turned off, and noticed the the AC fan was on and the other fan wasn't spinnig eventhough the engine was overheating. Are they suppose to kick in at the same time? Also are they both suppose to kick in when i turn the AC or just one fan.
If I have a fan problem how do i find out exactly what it is. I heard it could be something called a relay (where do I find that), I heard that it could be cooling sensor, or the fan. HOW DO I RULE EACH ONE OF THEM OUT? I don't want to spend a fortune taking it to the dealer or buying unnesary replacements.Car Heating Up?Nnormally your fans turn on in 2 steps without a/c on. The sensor reads the temp and sends it to the comp roughly primary fan 200* secondary 220* . to rule out fan, run wires straight to the fan from the battery . To rule out relay ,swap relays. To rule out sensor .Take resistance reading as it get`s hotter and see if it changes and in specsCar Heating Up?Yes it is either the fan relay or temperature sensor. It is hard to rule one of either out, just change both, they shouldn't be too expensive, like $100 for both or less.Car Heating Up?I had the exact same problem just last week. I have a 99 Corolla. Last week I noticed that my engine was overheating, so I took my car to a shop and had them take a look. They told me my radiator and antifreeze was OK, but one of my fans wasn't working, that's why my engine was overheating.
So, go get the fan fix before your engine blow up!! It might cost you one or two hundred dollars.
Good luckCar Heating Up?I'd check out the fan and the temperature sensor.Car Heating Up?okay start your car with the hood open.
watch the guage until it gets hot then the cooling fan on the rad should turn on.
if it dosn't theres a problem with the sencer,the wire going to the fan or the fan itself.
hope that helps
and good luckCar Heating Up?check the fins of the radiator make sure they are free of debris and bugs and such, clean if neccesary. all that garbage in the fins can cause overheating, actually I think one fan running would be sufficient to cool the water.
