I have 2000 Accord Ex 4 cylinder manual. It was recommended that i changed the fan switch near the thermal housing. The fans only worked when i turned on the AC and it doesnt work if its not on. Coolant temperature gauge is the same what could be the problem now?

 

If I am reading it correctly, you have not changed the fan switch near the thermostat housing yet, right? Just to check, unplug the electrical connector for the fan switch and jump the connector with a wire or a small paper clip, then turn the key ignition to "ON". The fan should come on. If it does, then it probably is the fan switch needing replacement.

If you don't have wire, use a small paper clip, not a large paper clip. Don't want to get the the metal connectors too large.

 

I tested it with the paper clip and the fans came on. I replaced the fan switch and it doesnt come on after turning the car on period.

 

The car has to really heat up before the radiator fan turns on. It usually takes awhile for it to be hot enough for the radiator fan to turn on. Also, bleed any air of the cooling system first.

Was the car overheating before this or was it normal.

 

in on this thread. I'm having the same issue for a while now. Gauge never says the car is getting too hot though so I haven't been too concerned.. But maybe I should be..

 

Yes it was overheating on Sunday water was boiling in the reserve tank. The needle was almost near the H. I had to put more anti freeze in the radiator as well. Is the drain plug that little **** that you can reach from the top of the engine to the right for the radiator?

 

The radiator drain plug is underneath at the bottom of the radiator.

The engine coolant drain bolt is also reached from under the car. Usually, you don't need to drain all the coolant though; many people don't even mess with the engine coolant drain bolt.

 

Ok...so how would you bleed the system to make sure no air is in the radiator?

 

Did you notice when the car started to overheat? For example, was it mainly when you were stopped? If it was when it was stopped, it is more probable of it being the radiator fan as the problem.

Trying to rule out any other things that may be going on.

 

I noticed smoke from coming under the hood yesterday I was in stop and go traffic coming home from work. I really appreciate the help not trying to go to the dealer if i can take care of it myself with a little feed back from the forum.

 

To purge the air out of the cooling system:

1. Turn the heater control to max heat.
2. Remove the radiator cap.
3. Some Accords have an air bleed bolt near the thermostat housing, where you would loosen the air bleed bolt, then fill the radiator with a 50/50 coolant mix to the radiator neck. Tighten the bleed bolt as soon as coolant comes out in a steady stream without bubbles. But, this is not always necessary and sometimes ineffective. (This step can be skipped or may not be applicable to your car.)
4. If you want, you can jack up the front of the car which will help to get the air out easier. But, not necessary. (This step can be skipped.)
5. With the radiator cap off, start the engine and run it till it is at operating temperature. Add coolant as necessary. This may take awhile, I usually run it until I see no more bubbles or air coming from the radiator for a while.

I usually rev the car up a little while the car is warming up to help get the air out and to open the thermostat faster, and refill as necessary along the way. Later, I will also feel the lower radiator hose to make sure the coolant is warm which tells me the thermostat has opened. (But, be careful of the fans, belts, etc.).

 

Thanks for the input ill keep you posted.

 

I was editing my last post a little, probably while you were typing your post. Re-read my last post just in case. Good luck.