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Old 19 Feb 2013, 10:31 am
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Join Date: Sep 2007
Posts: 11
Default why does my 94 accord overheat?

my 94 accord starts to overheat when i go about 5 miles and i come to a complete stop and stay there for a little bit the temperature gauge slowly starts to rise. when i start moving again it slowly starts to decrease as i go but when i come to a stop again it rises again. i noticed that the cooling fan wasn't turning on so i purchased the cooling fan relay but it still doesn't turn on with the new one in. so i turned on the ac to see if the fan would turn on to help cool it but the fan doesn;t turn on either. all the fuses are good. what could be the problem.
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Old 19 Feb 2013, 10:46 am
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Join Date: Feb 2013
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Well, from reading this the problem is directly related to the fan. The clutch on the fan is not engaging, so I would suggest first, testing to see if there is power to the fan by sending voltage through the 30-87 side of the relay. If there is voltage, send power through 30-87 and see if the fan kicks on. If it doesn't, then there's a bad connection, or high resistance, in the wire connecting to 87. If it works, hook up a test light from the 30 terminal for the relay, and to ground, if it works, you know you have power on that side of the relay. Now test when the fan is supposed to come on, if you have power at 86, if you do, then that means that the relay is receiving power, now hook up a ammeter into the circuit on the 86-85 side of the relay and if you get a reading, the relay is working fine and the computer is grounding the relay as it should. So now, suspect a bad fan. And then all you have to do is replace/fix whatever is broken and you'll be fine. The reason why it is cooling when you accelerate is because colder air is being forced into the radiator. The fans job is to circulate air into the radiator at idle.
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Old 19 Feb 2013, 11:01 am
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Join Date: Aug 2007
Posts: 478

Rest assured it not going to be coolent level. related but check just to be safe, if it is below a certain level it could affect fan operation,, after that check fans, one is a condenser fan and will only come on with the compressor clutch,, if compressor is not coming on due to low refrigerant the fan also won't,, and if the other fan is bad at the same time your car will overheat at stops,, I would personally jump the relays and check for power and gnd at the fans,, chances are there Will be pwr/and ground and you will need to replace the fan /fans (motors) ,, I have had this on older accords,
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