Ok so my car started to over heat we replaced radatior and thermostat but it still does it and i was thinking does my fan come on so i let my car over heat (it does it mostly when idles)poped the hood and realized fan wasnt on and my gage was almost to red but when i shut my car off the fan comes on what do i need to fix it also i think that when i turn the ac on it dropes the temp down i think the only reason i know that is couse after i poped the hood and checked fan i drove off but it was raining and started to fog so the onlyway i know to get them to unfog is to turn ac on and i noticed it droped temp??? please help
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Re: my fan in my 97 honda accord doesnt come on
When turning ac on the fans come on automatically ,sounds like u need to bleed cooling system ,get the air out ,look near goose neck or whre ur top hose goes in and look for a bleeder,fill up coolnat jug and radiator and loosen bleeder when nothing but coolant comes out (no air ) the shut bleeder off,,, if this doesnt help replace thermaste and repeat proceedure
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If the cooling fans are not coming on when the vehicle is overheating try this.
Look for the coolant temp switch B. it will be located near the thermostat housing on the back side of the passenger side of the engine (follow the lower hose to the engine). It will have a white with green wire and a black wire. Unplug it, turn the key to the run position, the engine does not need to be running. ground the white with green wire. if the fans come on replace the coolant temp switch B sensor.
On top of the heater matrix is a flap and i suspect that this flap isnt lifting to allow the air through ,on this age car i suspect its a cable and the operating plastic wheel has broke or the outer cable has come adrift from its anchor point you will just have to follow your nose and have a look and as a temp thing wedge the flap open with something
Sadly, it sounds like the overheating caused the cylinder head to warp. If this is the case, the head needs to be pulled out and resurfaced. Many times, when the head warps, it will contaminate the cooling water.... look for traces of oil in the coolant. Other times, you will be able to see a white cloud, water vapor, coming out of the exhaust. One remote possibility is that when the radiator was fixed, a sensor was disconnected, and if this was the case, the check engine light should be on.
I have a 96 and had similar problem. Did you replaced or removed the Thermostat? If you did please replace it with a new one and it should solve your problem. My vehicle was doing the same thing and after checking sensors and replacing Fan Motor, problem persisted until I replaced the Thermostat. Good Luck.
Most Hondas and modern car fans can and do run at will. 215 on a scan tool is just reading the sensor and variation is ok. A temp gun is more accurate. Ill bet your gage is still normal. I have a honda and the fan runs at times when I get out. Normal
There could be an obstruction in the heater core under the dashboard. It's also possible your thermostat is stuck in the open position. I'd start with changing the thermostat. As far as your A/C goes, either you have a slow refrigerant leak and whomever did the servicing didn't bother to check for leaks and/or the A/C compressor could be malfunctioning. Unfortunately A/C problems can be costly.