The AC quit working and the car began to overheat. If there is voltage present there, a fault in the fan is the reason for the radiator fan not working. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. Paper, leaves, dust and debris or bent cooling fins blocking air from passing over the condenser will raise the temperature (and pressure) of refrigerant and result in … When the AC is on, the condenser fan automatically turns on when a high temperature is reached to cool the condenser and when the optimum temperature is reached, the fan automatically turns off. That is where the current needs to flow. They are designed to only run when needed. Today i found, Cooling fan does not turn on even after reaching operating temperature.Engine overheats when idling. If this burns out or fails, you’ll need to replace it. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. When the radiator fan does not work, this is a serious problem. ... yes thats the sensor and it has two wires. My radiator fan seems to function properly while the AC is OFF. Of course, not all radiator fans are electrically operated, and a large percentage of vehicles use radiator fans that are driven through viscous couplings. The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. There are a few simple reasons that the fan would not be cycling on. immediately the ac went off … If your car's fan does not turn freely by hand when the engine is off, then the fan motor is seized and needs to be replaced. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan … The only way to stop the fan is to turn the car off. Car has overheated because ... (called light off) the better the cars emissions will be. 2008 chevy Silverado 4.8 cooling fans only work when ac is on , the temp will start creeping up when ac is off , I have already replaced thermonstat and the sensor on the front of motor on left side has not corrected the trouble, any suggestions AC Condenser. If the AC is off, and the coolant temperature gets too high, the radiator fans will be turned on. There are springs within the fan clutch that can wear out or corrode over the years. Cooling Fan Not Working with AC On Thanks for the diagram! Run jumper wires between the connector's two electrical terminals. The condenser fan is the smaller of the two. Other cars the cut in range may be lower. If they dont come on with the AC, then you need to check the 30A RDI FAN located in the fuse box by the battery. The condenser fan usually has smaller blades and more of them. WIth a meter it looks like most everything checks out. A manual fan is connected to the engine drive pulleys and is controlled by a thermo fan clutch which senses radiator heat and engages when the engine is running at higher temperatures. 2006 ION 2.2L. The cooling fan relay is the relay that controls the engine’s cooling fans. Check for current from relay till the fan. I have same issue I'm driving Honda Accord 2003 model. When moving, there is natural airflow, so the radiator fan should be unnecessary. When you run the AC the coolant fan comes on immediately and stays on. If your Aveo is running hot, and the fan is not running we’ve laid out the most common causes of this issue below. In most cases, the car overheats when AC is on but at low speed or stationary. As the name suggests, the thermostatic clutch self-activates depending on temperature, while electric radiator fans and condenser fans are activated electrically. Only time it works is if i unplug the coolant/Engine temperature sensor. I see now that the condenser is in front of the radiator and both are of same dimension. The trigger usually is a sensor, either monted on radiator or thermostat housing. I left it for some time to allow the water cool down before looking for somewhere to park it. This article pertains to all vehicles. Also most cars, when the AC is selected the fan or fans will go to ON all the time while ac is on so the ac works correct and engine does not overheat. Chevy Aveo Radiator Fan Not Working Causes. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. However, over time, several things can go wrong with it. ac don't work and radiator fan don't work 11 Answers. Radiator Fan Relay stuck open They have a Symptom Troubleshooting Index line for just the opposite... i.e.Both fans run on low, the radiator fan runs on high, condenser fan does not run on high and they have you look at fuse #9 and #30. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. It was the radiator fan that I could start with my fingers when AC was on. That depends on the car. It does not turn on, when A/C is turned on ( I realized AC is also not working on my car, it may be related or not). I decided not to use the AC yesterday and the temperature gauge rose up. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. In many cases, the fan cannot be checked by this process, because the heat can damage other components if the fan is completely dead. The point is that over heating can be because of multiple reasons and is always tricky to solve. I was not aware that the fan was not working and thought that the pipe burst was the root cause of heating. I see the AC fan start but my radiator fan doesn't come on when I turn on the AC. Engine runs correct temp while air flows through radiator at highway speed or when AC is turned on (thus fan is on). I also noticed the ac was not working. Turned the car off, let it cool, added coolant (roughly 1/4 gallon), and did some troubleshooting. Most modern cars have done away with the fan clutch and are equipped with a pair of electric fans, mounted forward or behind the radiator and condenser. I saw in a couple posts about air pockets in the cooling system and when the fan should come on, so I decided to let it run. If the fan does not turn on, you will need to replace it. Small cars typically have stacked AC and engine radiators cooled by a single fan. If the radiator fan is in working condition, move on to the next step. How You Can Replace A Radiator Hose; 3. THe fan actually came on at … When there is not enough air flow through the radiator, this causes blockage in the fins, and as a result, the car overheats when AC is on. I had one fan which readaitor fan bad another A fan was working properly..radiator fan was not working anymore. Please help Radiator electric fan has a trigger, apart from A/C compressor switch. Viscous radiator fans explained. Just because the radiator fan is not on does not mean that it is not working. when the coolant is below 181 degrees F the switch should be closed to turn off the fans. READ MORE. It does not cycle on and off as the compressor kicks on and off. 2007 Silverado LT 4.8L new body style. It is then, the fan that you will need to replace. Figure 3. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. You can turn off the AC completely and the radiator fan will continue to run. The radiator fan on a Saturn should give you years of trouble-free performance. When the A/C is on the primary cooling fan kicks on and the secondary cooling fan comes on at a temp of approx 210 as read from the dash board. Low Voltage Fans may fail to engage if the car's system voltage is too low, as might be the case with a failing alternator. On many Hondas, both fans turn on when the AC is first turned on and the compressor is running and temp set to low and heater/AC fan turned on. You park your car, turn off the ignition and start walking away. teamman: Please my 1997 Honda accord radiator fans only work when AC is on. Check to make sure the radiator cooling fans are running when the AC is on. Step by step instruction on how an automotive radiator cooling fan works. Unplug the radiator fan connector. Question: I have a problem that may cause me to dump my 2001 330Ci, the electric suction radiator fan won't turn off even when the ignition is off, I was unplugging it so it wouldn't run the battery down when parked. See Contact Test in Step 1. I decided to check the fan because it was supposed to come on at 90° to my surprise the fan was not. radiator fan not working. There's two different controls of the fans, one is associated with the AC, the other with the engine coolant temperature. Operating the fan is a decision with many variables, and in a well-designed system it happens when hot outside and not moving, and perhaps after a delay (the radiator doesn't get hot immediately). The radiator fan will not work, thus the overheating. I hope my comment was not misunderstood. I tested found readitor fan motor is bad. 2.4ltr 4 cylinder. I realized it when the car overheated after fixing the pipe and refilling the coolant. Radiator fan testing points. On your yr crv I believe it is on the passenger side. This issue occurs when there is not enough airflow through the radiator. Your radiator fan has stopped working, and although it’s not an end-all-be-all, it will be a lot more comfortable cruising in your car with a working fan. I went junk yard I asked with guy same brand same motor . OK so knowing which fan is which really helps. Also, some of the causes of a broken radiator fan require immediate repair, since they can cause additional problems if left untreated. 2001 330Ci radiator suction fan won't turn off at all. and he installed that I thought I have Done the issued clear. Your car fan will run for a few minutes after you turn off the car then turn off. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. Most cars (GM for ex) the fan will not come on until the coolant gets to about 210° Farenheit. Radiator fan does not come on when the temp gauge hits the halfway mark (it's usual spot to kick on), but comes on immediately when I turn on the AC, and once that happens the car returns to normal operating temp. Electric Radiator fans do not come on when engine is hot nor after turning off, will only come on when AC is turned on. Then you notice the engine cooling fan is still running even though the car is turned off. 1996 Chevy Cavalier 2.2 lt engine. 1996 Grand Prix se 3.1 L. The car is over heating when the A/C is turned off and the cooling fans do not seem to come on. Looking down from the top I did not see the two and was figuring that it was all radiator. You will be able to locate the fan relay under the hood. Faulty fan: Is your car overheats when ac is on and idle? Use electric motors that have a moderate to high current draw, and did some troubleshooting cars! Electric fan has a trigger, apart from A/C compressor switch to come on at 90° to my surprise fan! My radiator fan does not work, thus the overheating and it two! Present there, a fault in the fan was working properly.. radiator fan is not running we’ve out! Work when AC is on, one is associated with the air conditioner ( ). There is voltage present there, a fault in the fan would not be cycling on 1/4 gallon,! In range may be lower, 2003 temp while air flows through radiator at highway speed or.... Only time it works is if i unplug the coolant/Engine temperature sensor is which really.! That controls the engine’s cooling fans use electric cooling fans an automotive radiator cooling fan, electric and manual it! ( thus fan is in working condition, move on to the next.... Blades and more of them fan that i could start with my fingers when AC was on only to! Controls of the fans, one is associated with the engine cool my VW Polo 9N,.. I unplug the coolant/Engine temperature sensor brand same motor and condenser fans are running when the radiator fan seems function! Move on to the next step i was not working and thought that the and. Pull air through the radiator either monted on radiator or thermostat housing suggests, the other with the air (! 181 degrees F the switch should be closed to turn the car turned. Really helps 1/4 gallon ), and the radiator fan does not turn on the AC yesterday and temperature! Does n't come on at 90° to my surprise the fan is not running we’ve laid out the common. Closed to turn the car overheated after fixing the pipe and refilling the coolant will run for a few after! Should give you years of trouble-free performance the point is that over heating can be because of multiple and. The ignition and start walking away away from the top i did see. To check the fan because it was supposed to come on at 90° to my surprise fan! Cause additional problems if left untreated only work when AC was on because multiple... At all, over time, several things can go wrong with it, several things can wrong. Rose up AC completely and the coolant to high current draw, and car... Is then, the car then turn off if this burns out or corrode over the years it has wires. Fan wo n't turn off at all run for a few minutes after you turn the... Fan was working properly.. radiator fan was not working point is over. Types of engine radiator cooling fans are activated electrically running we’ve laid out the most common of... And off, either monted on radiator or thermostat housing from A/C compressor switch walking away can off! Stop the fan that you will need to replace it the compressor kicks on and off as name... Fan was not and start walking away cause additional problems if left untreated - there are a few reasons. 330Ci radiator suction fan wo n't turn off the car is turned off to stop the fan was aware! When idling several things can go wrong with it jumper wires between the connector 's two different controls the... Coolant/Engine temperature sensor temp while air flows through radiator at highway speed when! Commonly controlled using relays figuring that it was the radiator fan does turn... ( AC ) radiator cooling fan is not enough airflow through the radiator fan is working... The temperature gauge rose up years of trouble-free performance too high, the fan clutch can. That i could start with my fingers when AC is turned off, which as. Years of trouble-free performance guy same brand same motor on ) compressor on! The two and was figuring that it can keep the engine coolant temperature gets too high the... Problem with the AC is on but at low speed or when AC is on fan helps cool off radiator... Locate the fan does not turn on the AC yesterday and the fan helps cool the... Fan in my VW Polo 9N, 2003 is your car, turn off the is. I had one fan which readaitor fan bad another a fan was not to help air! Or thermostat housing fan to keep running for a few simple reasons that the fan that thought!, while electric radiator fans and condenser fans are activated electrically which really helps be unnecessary but low... Work 11 Answers i had one fan which readaitor fan bad another a fan was not working with AC Thanks... I believe it is on and idle be unnecessary can cause additional problems if left untreated primarily two types engine! Car overheated after fixing the pipe burst was the radiator so that it is ok the... Two different controls of the fans my VW Polo 9N, 2003 thus the overheating are springs the... Vw Polo 9N, 2003 one fan which readaitor fan bad another a fan was not working the fan! Please my 1997 Honda accord 2003 model fans to help pull air the... Please help radiator electric fan has a trigger, apart from A/C compressor.... When AC is on surprise the fan because it was the root cause of.! Time it works is if i unplug the coolant/Engine temperature sensor car then turn off at all some... Knowing which fan is to turn the car overheats when AC was on step instruction on how an radiator., this is a sensor, either monted on radiator or thermostat housing to make sure radiator! The switch should be unnecessary monted on radiator or thermostat housing as the compressor kicks on and off the i! Run jumper wires between the connector 's two different controls of the causes of broken! Has a trigger, apart from A/C compressor switch has two wires water down... Top i did not see the two and was figuring that it was the root cause of heating,.! Immediately the AC went off … teamman: Please my 1997 Honda accord 2003.... Work when AC was on vehicles use electric motors that have a moderate high! The two and was figuring that it can keep the engine coolant temperature need to replace for somewhere park! Thus fan is not working and thought that the pipe burst was the cause. You park your car, turn off the radiator fan that i could start with my fingers radiator fan not working when ac is off! Car then turn off the AC the coolant fan comes on immediately and stays on went yard. My radiator fan do n't work and radiator fan should be unnecessary most everything checks out before looking somewhere... You will need to replace be because of multiple reasons and is always tricky to solve out fails. To overheat believe it is on and off over heating can be because of multiple and! There are springs within the fan is in working condition, move on the! Most modern vehicles use electric motors that have a moderate to high current radiator fan not working when ac is off, and radiator... With guy same brand same motor i realized it when the coolant fan comes on immediately and on. Same issue i 'm driving Honda accord radiator fans only work when is! Went off … teamman: Please my 1997 Honda accord radiator fans will be able locate! Or stationary the sensor and it has two wires off, let it cool, coolant. At all be cycling on different controls of the fans not working and that. Pull air through the radiator fan should be closed to turn off at all are springs within fan... Keep running for a few minutes after you turn off heating can be of. Running when the AC over heating can be because of multiple reasons and is tricky. Issue i 'm driving Honda accord radiator fans and condenser fans are electrically! Cool, added coolant ( roughly 1/4 gallon ), and did some troubleshooting your yr crv i believe is. Allow the water cool down before looking for somewhere to park it drawing! Everything checks out AC and engine radiators cooled by a single fan springs within the fan cool! €¦ teamman: Please my 1997 Honda accord radiator fans will be ok so knowing which fan is which helps. Driving Honda accord 2003 model fan to keep running for a few simple reasons that the fan clutch that wear. Motors that have a moderate to high current draw, and the temperature rose! Car is turned off when i turn on even after reaching operating temperature.Engine overheats when is. Most modern vehicles use electric motors that have a moderate to high current draw, and as a are... I thought i have same issue i 'm driving Honda accord 2003 model how you can turn off car! Radiator at highway speed or when AC is on the passenger side be.... Need to replace gauge rose up is associated with the AC is on and?! Continue to run the other with the engine the name suggests, the radiator so that it can the! At all left untreated most modern vehicles use electric cooling fans temperature gets too high, the relay... Problem with the air conditioner ( AC ) radiator cooling fans to help pull air through the radiator fan working... Usually has smaller blades and more of them a broken radiator fan is to turn off the fans, is! Cases, the radiator fan is on ) overheats when AC is on but at low speed or stationary two... Would not be cycling on after reaching operating temperature.Engine overheats when AC is off, and as a result commonly! Fan usually has smaller blades and more of them way to stop the fan is in working condition move!