Hi I have a 1992 Acura Integra GS. Well its overheats after a very long drive when sitting at idle but it only does this sometimes. Well I think my fans are not kicking in but it was working before. Its not the Fan Switch next to the thermostat, I have replaced that. Do you think its the relay its might just be old. And also when I turn on the A/C the fan kicks on for like 10 sec thens stops running. It will kick on when you turn the car off. I have also bled the system too. I kept the radiator cap open and let the fan come on 4 times to bleed the air.
MM&Y of car would help.
Could be an old rad fan relay, rad fan control unit, ECT switch, [not ECT sensor] the rad fan itself or wiring in the rad fan circuit. 94
I have the model, make a year of car up their.
That is a tough one. The running for 10 seconds thing is particularly odd. However, if something is wrong with your A/C system or if it is just too cold outside, I know the A/C compressor won’t come on, but don’t know if the condenser fan comes on or not.
After the car is off and for that 10 seconds that the fan runs after you turn on the A/C, is it BOTH fans, or just one?
Also, are you sure that your coolant temperature is actually getting too hot? “Overheating” is kind of a subjective term so I’m not sure exactly where on the gauge you are talking about. This one may seem patronizing, but I don’t mean it that way, are you sure that you changed out the switch and not the sensor that goes to the gauge? I could see a situation where you got an autoparts store sensor and your gauge is just reading higher than where it used to be.
Switches can also go bad quickly sometimes. When your car overheating, is there continuity between the two terminals of that ECT switch?
Does the radiator fan come on when you jumper the plug that connects to the ECT switch?
The coolant tempenture switch turns on the cooling fans by way of the radiator fan relay and condenser fan relay. The cooling timer unit keeps the fan on after the key is turned off by way of the oil tempenture switch. If you pull fuse #20 it will keep the fans from running when the key is off. Pulling this fuse will also keep your a/c compressor from running. Fuse #20 is where it gets the power to engage the A/C compressor clutch.
When you turn the A/C on it turns both fans on by way of the A/C diodes and ECU. This takes the coolant tempenture switch out of the picture. (The car need not be hot for the fans to run.)
I had the same problem i change the relay also and i had change the switch about 10 times…
I got I got a OE switch from the honda/acura dealer everything works fine now…
yeah the fan only kicks on and off when the ac is on. maybe becuase its just cold, but anyway I adjusted my timing to stock because i never checked it. My timing was off. But When it did try to overheat, It wouldnt go over the middle, it would stay their then just go down because the thermostat opened and when i reved the engine the fan came on
Oh, Ok. So it isn’t overheating at all then…
(that gauge is made to sit directly in the middle if the coolant temperature is anywhere between 85 and 100 degrees C which is desired operating temperature)
still overheating but randomly
Well it still overheats randomly. But takes awhile to do it. Just today while I was driving a steady speed, I saw the temperature gauge go to the middle. Then when I stopped it started goin up but only to the 3/4 mark. Could it be the thermostat not opening up, its not oem and im not losing any coolant. I also adjusted the timing to stock. Also I had the relay replaced too, and fan switch has been changed still doin the same thing. mAybe their is still air inside. but Im pretty sure I bled it right.
I think all my problems are because of the thermostat i put in. its an aftermarket one, its a stant thermostat, imma go get a OEM one
Well no more overheating, the aftermarket stant thermostat was only in for a year and started to give me problems after that. it wasnt opening when the car was warmed up, Got an OEM thermostat from Acura about $32.00. Now both hoses are hot. Im never goin with aftermarket thermostat.