My car temp is getting hot, has not overheated, there is coolant in my car. I turn the heater on to cool it down, one person things my fan is not turning on to cool my engine, car is 2000

Do the cooling fans work ? Turn on the A/C do you hear the cooling fans running ?

Do not continue to operate. Operating an overheated engine will cause the engine to fail.

After the engine has cooled,
Confirm that the engine has coolant.
Confirm that the reservoir is full to the mark
Start engine and confirm as engine gets warm cooling fan at radiator turns on

Confirm that the rubber engine belt is working
Put in car heater to full hot and blower on.
Confirm heat is hot from car heater.
If heater is not hot possible water pump failure or air in coolant system keeping the coolant from circulating.
Allow to cool completely.
Remove cap start engine and observe coolant flowing at or near cap. Observe bubbling or exhaust gases coming from radiator

Check for water in oil by pulling dip stick

• White smoke from the exhaust pipe
• Overheating engine
• Bubbles in the radiator or coolant overflow tank
• White milky oil
• Significant loss of coolant with no visible leaks

If milky likely a blown head gasket

Hope this helps?

If there are no leaks, you may have a blown head gasket. The heater stops working when air or combustion gasses get into the cooling system.

you might want to see if the cooling fan is working at the radiator.if its not then the fan motor may be no good.by putting the blower motor on you are giving the system air flow to pull heat out of the cooling system by it blowing air over the heater core.you can remove the plug on the fan motor and connect jumper wires directly from power and ground to the connectors on the fan motor,if the fan doesn`t work then the cooling fan motor will have to be replaced.you also could have a thermostat that is not opening all the way causing a rise in engine temperature.

Heater control valve malfunction will not cause engine to overheat unless coolant is leaking externally...Overheating going down the road can be the result of a few different things...Partly clogged radiator...Insufficient air flow due to possible fan problem...External coolant leak...Make sure fans are operting properly and have cooling system pressure tested for leaks...Gaining and losing heat on the inside of the vehicle usually means system is low on coolant but you must find out where coolant is going

Make sure the cooling fans are working when the engine reaches above normal temp,if they are not ,turn the ac on,and see if the cooling fans come on,if so,replace the coolant temp sensor,if it has a clutch fan,then replace it,for it is not staying engaged ,and is not turning fast enough to cool the radiator.

Make sure the cooling fans are coming on.And most important bleed the air out of the cooling system.When it is cooling correctly,the cooling fans will come on,and then they will go off,when the engine has cooled down.

There are 2 fans on this car - one which is mechanically driven by a belt and will draw more or less air depending on engine temp (viscous coupling), and one that is electrically driven and will turn on or off generally only when the A/C is turned on or off. However, the engine ECM has the ability to override this normal operation when something abnormal is happening - in this case the ECM thinks the engine is overheating. If the coolant temp sensor tells the ECM that the engine is too hot and the A/C is on, the ECM will turn the A/C compressor off, but leave the fan going in an effort to keep the engine cool and not overloaded. If the A/C is off, the ECM will just turn on the fan. The fan will stay on (and the A/C inopperatve) until the engine has returned to an acceptable temperature. Of course, if that were the only problem, the air coming out of the heater should be stinking hot - provided there is enough coolant to actually get to the heater. I'd be checking your cooling system very closely - both the level, and whether or not it is holding pressure. Check also for any external blockage of the radiator. If it has been overheating like this for a while, I would recommend changing the thermostat (temp regulator) after any other repairs are made. Suzuki thermostats generally fail OPEN and then your engine would run cool. If all the above is wrong, then you have have an electrical problem which will probably require an auto electrician.

It sounds like your cooling fans are not comming on by themselves, but when you turn on the ac it forces them to turn on. Make sure relay is good, then replace coolant temp sensor, this may have failed no telling pcm to turn on cooling fans. Thanks

Cheak to see that the coolant fan is operating with the A/C turned on. The fan has to work to help the engine stay cool and help the A/C. When you apply heat on the control it acts to reduce the coolant temp. You will have to get the coolant fan operation checked. This can be :fan motor, fan relay, temp sensor and computer. Good luck