Question about 2000 Isuzu Rodeo

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The radiator electric fan works while a/c is on but it does not work in spite of the tempratur is so high and the fan cluch is ok

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  • Nabil Fekry
    Nabil Fekry Sep 17, 2012

    how to check coolant sensor



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The electric fan should always come on when the AC is switched on, this is to ensure that the compressor cooler always has air being drawn though it. If the electric fan does not come on due to the high temperature of the engine coolant alone (AC off), then it is likely that a) the coolant sensor is faulty b ) the wiring to the sensor has either shorted out or come adrift.

Posted on Sep 08, 2010


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1993 toyota pick up temperature gauge problem

Or the thermostat might be faulty which raises the temprature at which the thermostat starts to open. Giving a high reading on the gauge. if it gets too hot you might be at risk of blowing a pype or head gasket. If so replace thermostat. Check for a loose wire to the temp sensor as well. See if the radiator fan turns on when temp rises. If not check a fuse or the radiator fan temprature switch might be faulty.

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How do i replace fan cluch

The fan and shroud is a unit so easiest way is to remove the top radiator hose and radiator support brace. Don't forget to disconnect the electrical connector from the back of the fan clutch. Good luck

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2002 isuzu rodeo 4 cyl twin electric radiator fans when cold turn igniton on fans run on high speed , it has a brand new battery and the alternater is checked ok it will not run hot and after it runs

Assuming the check engine light is not on, I would want to know what the engine temp sensor is doing.
A scanner would tell you what the temp sensor is showing - if it is unplugged or there is a problem with the wiring the fans will run as a default to prevent the engine from overheating. It could be a fan relay but I doubt it. A relay usually works or not.

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1 Answer

I have I 35 Infinity 2004, After driving 30 Mints, The car temprature meter goes very high, and coolent reserviour bottle filled up all the way and bubbles pops up on the surace inthe bottle. Looks like...

you need to check the fan fuse, and if that turns out to be ok, then move to the fan relay, disconnect the fan at the connector, and use jumper wires to a 12 volt supply ( the battery will work for this) and make sure that the fan works, if it does, its going to be a fuse or the relay 99% on the time, also check the thermostat

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01- Dodge Caravan AC Heater Control it only works on high none of the speeds work when I rotate the switch from low to high. Is this a swith problem or a motor problem?

Most likely neither. The most common cause is that an electrical device called the blower motor resister block, has failed. This device provides all the slower speeds. It is generally mounted in the HVAC [Heating, Ventilation & Air Conditioning] box, very close to the blower motor. FYI, we mechanics call the fan motor inside the cabin the blower motor. The electric fan motor behind the radiator is called the cooling fan motor.
If the resistor block is OK, then you have either a bad fan speed switch or a melted electrical connector at that switch. 95% of the time, the resister block is the problem.

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The radiator fan does not switch on automaticly when the car reatches max temprature. Tested the fan, it is wortrking when I unplug the censor on the airfilter housing. What has the censor in the airfilter...

Sensor in air filter is one of MANY that's connected to your cars computer. I suspect the sensor your looking for is aux fan sensor which is mounted on side of your radiator. It's a brass fitting with electrical connections coming from it.

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Run a jumper to the fan to test it, if the fan works,its the temprature sensor thats bad, if the doesnt work replace it.

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1 Answer

My Car temprature goes up when I am stopped on Triffic Light. The AC stops working at that point too. AC starts working after I drive without stopping. The temperature goes down too. I checked the Radiator...

Good day!
electrical radiator fans typically have 2 speeds a high and a low. you may be having an issue with the high speed of the fan, that is why when you are not moving the temperature goes up!

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2 Answers

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1 Answer

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As long as the fan eventually shuts off this isn't a problem,the fan will continue to run for a bit after the car is turned off,once it reaches a set temprature it will turn off.

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