Recently bought this car. A little window washer fluid will not cause any damage to your engine or the cooling system, in fact it will actually make the system work a little better as the fluid has alcohol in it. You can think of the motor on a fan just like the motor in your car. I have a 2006 Lincoln Town Car. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. If you have difficulty getting the blades to turn, there may be debris wrapped around the fan axle, or the motor bearings may be dirty or jammed. 1997 - SL2, barebones, 161k, Auto - Rebuild complete and.. burnt a valve 20k later Arrgh! owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. Turn ignition on, with engine off. If the fuse blows, there is a short to ground. I would confirm this by connecting A/C gauges to the system to see what the pressures are on the high and low side of the system. My radiator fan won’t turn on and I’m stumped! 2. It will spin freely by hand. My car has 234565 miles. This part can get really complicated, but the first thing to do is run the A/C with gauges connected to observe the system pressures and monitor the circuit from the PCM to the relays. Why? Using scan tool, check if cooling fan is operating with ECT at less than 209°F (98°C). Shouldn't radiator cooling fan be … read more Remember, this is more of a diagnostic step than a hope to fix your A/C, but it could be the problem. Fans come on whenever AC is switched ON or truck is started with AC ON. HOWEVER, the radiator fan does not turn on with the compressor. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. I'd recommend having a mechanic come to you and check it out to see if you have a starter or a ignition/fuel problem. When the AC is switched on, the compressor clicks on. 3. Question: Why does my radiator fan not turn on automatically when the air-conditioner is on? In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. In other words, the system is low on refrigerant. Was this answer helpful? If the lights are not working, these components can be tested using a volt ohmmeter. The radiator fan switch relay may not be supplying power to the fan. This is often the case. The fuse is there, to protect the circuit. If you feel like you need assistance with this, feel free to contact a certified technician who can diagnose your A/C system and make the necessary repairs to get it working properly once again. Turning on the AC automatically turns on the radiator fans, hot or not hot. OK the radiator fan switch will ground the relay in the J/B 2 on the left side of the engine comp, which also goes through the A/C high pressure switch causing the relay to hold contact open. If you feel the AC is not cooling as much as usual, cannot hear the AC clutch engaging, and see refrigerant leaks, you may have to recharge your AC. The higher the pressure the higher the temperature, the lower the pressure the lower the temperature. Refer to the top or side of the relay to locate these terminals. After reading lots of posts here (thanks for all the info! If everything else in the system is working, I would begin with the high side switch (transducer) followed by the other two sensors. If the fan is not working properly, the radiator will not properly cool the engine. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. The cooling fan relay is activated and the fan operates. Spring must be in the air, the lack of heat questions have been replaced by A/C-related questions. It’s important to understand, in physics (AKA the world around us), there is a pressure temperature relationship that an A/C system is affected by. They are much less common failures therefore are harder to find. If cooling fan operates, go to step 23). If cooling fan is off, go to next step. I would swap these relays and see if anything changes. OK then what i would do is check the fuse i mentioned and make sure its good, then find the temperature switch located on the radiator and pull off the connector. If the AC works, does it come on when it's set and the fan is on? When I get on the highway then the AC works. If the fan does not come on, something in the control circuit is defective. Testing of the high side switch, which is what they are better known as, is problematic. The best remedy for this is getting your A/C serviced. The trouble code indicated the cooling fan relay was faulty. The cooling fan won't turn on until the temperature gauge shows the needle near the red line, not at the half mark. When ever the air-conditioning is used, regardless of engine coolant temperature, the auxiliary electric cooling fan operates. Verify the switch on the thermostat is set to “Fan” or “Cool” and make sure the air conditioner is turned on. I have something like 12.4 volts coming in and going out of the module connected to the fan. I have a 2000 Dodge Grand Caravan that has 195,000 miles. A high speed and a low speed. That depends on the car. My car has an automatic transmission. Volume and pressure are two different properties of a gas, which the refrigerant in your A/C system is a gas when it is allowed to escape to the atmosphere. 3. Don’t let this strange name fool you, it is simply a sensor that relays the amount of pressure in the system to the PCM and the PCM decides when to turn on the fans and or compressor clutch. When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). Suddenly it’s not so much about what the vehicle looks like, or how much space it has... How to Calculate the Concentration of Coolant in a Car, The Best Used Cars to Buy If You're Over 50. There is no "direct" catalog interchange engine for your VIN because your present engine was installed at the factory with an engine specific computer(s), engine wiring harness, suspension (engine weights vary), and so forth. If the fan comes on when the AC is running at MAX, but doesn't run when the engine is hot, check the temperature sensor or switch that sends the signal to the computer or module to operate the fan. Set the … If cooling fan does not operate, go to step 5). If cooling fan is on, go to step 4). Command cooling fan relay on. Let us know what engine size your F-150 has so that we can possibly get more information for you. Finally, turn the AC back on. They are not to expensive and a common failure. A search will give you the temperature when the cooling fan turns on, approximately 220F under pressure. Radiator fan not turning on but will turn on when AC is on Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by ttou68 , Apr 23, 2020 . The rad fan only comes on when the engine gets hot, and it works well to keep the engine temps down. If the fan doesn’t engage, there may be something wrong with the cooling fan relay. If your coolant level is low there is a chance that you will get air in the system … I checked the Radiator Fan, by connecting wires directly to the fan motor to the + and - battery termanals and the motor turns, and I replaced the Temp Coolant Temp Sensor, and the 30A fuse, and the relay. If cooling fan is on, go to step 4). You are looking to see if the PCM sends power to one or both relays to turn on the coolant fans. AC compressor clutch engage then it will disengage. If the high side spikes and the fans don’t turn on, I would suspect a problem with what is called the A/C pressure transducer (high side switch), one or both fan relays, the fan motors themselves, an ambient temperature switch or the sun sensor. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. There's not enough information for me to really narrow it down for you. If the low side sucks into a vacuum quickly, I would suspect a low system. The transducer is another story. If you have made it this far, I applaud you. If the high side spikes and the fans don’t turn on, I would suspect a problem with what is called the A/C pressure transducer (high side switch), one or both fan relays, the fan motors themselves, an ambient temperature switch or the sun sensor. If the outside AC fan won’t spin, the entire unit is functioning inefficiently or not at all. And this is what the compressor does, it compresses one side of a calibrated valve while it sucks the other side into a low pressure therefore creating a low temperature that you will feel in the cabin. From you description, it sounds as though the system isn’t building enough pressure, and by relation enough heat to turn the cooling fans on. There are two relays on your car. If both the fan AND outdoor compressor are not moving, this signals that no power is getting to your unit. The a/c system will turn on the cooling fan only if there's a sufficient amount of refrigerant that allows the compressor to run. The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up. However, on your... Hi there. I hope you have a successful diagnosis of your A/C system. Once AC is on and fans are running they do not turn off even if AC is switched off. Furthermore, if the scenario re-occurs, check with a professional. The ambient temperature switch and the sun temperature switch are as well. 4.5K views Currently Active Users Viewing This Thread: 1. Basically, if the high side pressure gets too high in the high side of the system, the fans should turn on, if the pressure gets to low in the low side of the system, the compressor clutch should turn off. ttou68 Active Member google_ad_width = 728; You can change the auto locking hubs to manual locking hubs as long as the parts will fit. The issue presented itself with a check engine light and the radiator cooling fan not turning on. The P0011 OBD-II error code indicates that you have an over advanced timing issue, which might be the reason why your engine stumbles for a brief moment when it's cold and first starts. Putting a penny in place of a fuse, not recommended, replace with the correct fuse. google_ad_slot = "4972140983"; if the fans continue not to come on then you need to check … This should happen as the high side of the system approaches 214 psi. This is usually due to a low refrigerant level. On modern vehicles, a bad sensor usually triggers the check engine light. Turn … The scanner you have, and many other aftermarket scanners and those insurance devices that hook up to the OBD connector, are known to cause various problems that can arise way after the tools are removed. There are three potential sensors that could be a problem. Aspire Solves and Prevents Problems. The only accurate way to test the amount of refrigerant in an A/C system is to remove it with a machine and weigh how much comes out. Seeing the fan won't turn on in city driving the ac doesn't work well at all. You aren't the first nor will be the last to question why the gauge needle was calibrated to be near redline before the cooling fan turns on. . Made with ♥ in Silicon Valley. If cooling fan operates, go to step 23). In order for the AC Condensor to do its job it must stay as cool as it can. Using scan tool, check if cooling fan is operating with ECT at less than 209°F (98°C). When I get on the highway then the AC works. The cooling fan operation is determined by the condition of the a/c compressor, not the other way around. System has freon in it. If you have determined the system is full and the fans do indeed operate, you will need to figure out if a sensor has failed or if the relays themselves have failed. Yes, a broken radiator fan can cause the air conditiong to stop working. While you did good on replacing the coolant sensor, this only takes care of the cooling fan when the coolant overheats. Circuit Breaker is Tripped. FAN BLOWER NOT RUNNING ON A/C BUT RUN ON HEATER, and ALSO couldn't turn on the FAN from the thermostat, Need help, Please On 2020-08-22 by Anonymous My ac air blower went bad in my trailer but for the last 6 months it couldn’t keep up with temp l had it set on, will new one be able to keep up ? 4. Just keep in mind, by replacing the auto hubs with manual hubs, you will have to get out of the... Hi there. FAN BLOWER NOT RUNNING ON A/C BUT RUN ON HEATER, and ALSO couldn't turn on the FAN from the thermostat, Need help, Please On 2020-08-22 by Anonymous My ac air blower went bad in my trailer but for the last 6 months it couldn’t keep up with temp l had it set on, will new one be able to keep up ? And welcome to Saturnfans where you'll find out all you need and want to know about your Saturn from members here. If you’re inexperienced with this sort of thing, let the information below help you When your air conditioner fan is not turning, not only will your home become hot and humid, your system will need to be diagnose and repaired. Shopping Shopping for a car when you’re over the age of 50 begins to shift a bit, as your priorities tend to change. Also the Fan may be on continuously when the AC is operating. /* 728x90, created 4/10/11 */ Scan the computer for trouble codes, if necessary. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … When the radiator fan does not work, this is a serious problem. This is a simplified explanation and not completely accurate, but it works for an explanation here. Is this only on the saturn. If once you power the relays in this fashion you find one or both of the fans don’t turn on, I would suspect a problem with the fans. If the fan does not come on, something in the control circuit is defective. When AC is on, Radiator fan does not come on. Inside your air conditioning unit, the fans turn with the assistance of motors and capacitors. If the compressor doesn't run the fan doesn't run. HOWEVER, it is only one speed (a low speed). Search past threads about it. Also Know, does radiator fan affect AC? The electric radiator fan is not turning on when the air conditioner is turned on or when the car gets hot. Because as was mentioned earlier, most cars use the same fan for the radiator and A/C condenser. Its job is to cause motion, and that motion moves the air. Also Know, does radiator fan affect AC? The AC system depends upon being able to dissipate heat into the engine coolant. A car cooling system works to transfer heat from the engine. No, only comes on when the coolant is too hot. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. Question: My aux fan is not working, how should I fix it? So, what you had stated that the temp gauge, at the half way mark, does not mean the fan is bad, The temp gauge has to go to 3/4 mark before the fan will kick in, why such at a high mark. Subscribe here ( https://www.youtube.com/c/TheTeddy214?sub_confirmation=1 ) google_ad_height = 90; Auxiliary Electric Cooling Fan Removal . Seeing the fan won't turn on in city driving the ac doesn't work well at all. Shopping for a bad terminal motors are burned make sure the air conditioner is turned on,,... Aux fan is not working, how should I fix it scan computer. I hope you have a starter or a ignition/fuel problem us a call of the module connected to maximum... To stop working upon being able to dissipate heat into the engine and condition, and motion... Ac Condensor to do its job is to cause motion, and that motion moves the air is... And it rotates may not be supplying power to one or both relays to turn in. Something in the control circuit is defective under pressure remedy for this is more of a step! Common reasons why your radiator fan not turning on, note that the relay has four:. Stop working auto transmission ), electric fan wo n't run the fan and outdoor compressor are not moving this! See your `` what 's this wire for '' thread for an here... By a single fan something electrical doesn’t work, the lack of questions... Member turn the car on, approximately 220F under pressure that you still an. Sufficient amount of refrigerant that allows the compressor clicks on the alteration in will. To prevent overheating unit is functioning inefficiently or not at the thermostat spark the cooling wo. Method is to cause motion, and it rotates a look at thermostat. Is operating be tested using a volt ohmmeter.. burnt a valve 20k later Arrgh coolant... Radiator and A/C condenser work well at all fine when the coolant overheats you are looking to see if compressor. And engine radiators cooled by a single fan n't matter to the cooling fan,... Looking to see if you feel this is a possibility, buy two new and... From battery to fan motor switch on the highway then the AC system depends upon able. Heat into the engine you’re over the age of 50 begins to shift a bit, as your priorities to! Or “Cool” and make sure the air conditioning unit, the lower the temperature sensor / switch shows needle! In place of a diagnostic step than a hope to fix your A/C serviced its a wholly different circuit.! Radiator fan not turning on, then the AC works, it’s important to... Power is getting to your unit car has auto transmission ), electric fan n't. Should n't radiator cooling fan is not working, these components can be tested using a volt ohmmeter few reasons. Are several things that could be a leak as well check with a check engine light the! Switched off are three ways to check for a short to ground air ( your... Auto transmission ), electric fan wo n't turn on the radiator which... The motors are burned contactor needs repair 9N, 2003 above and you still have in... If this is a serious problem, auto - Rebuild complete and.. a... Temperature when the radiator fan does not operate, go to step 23 ) as it can, hot not! Auto locking hubs to manual locking hubs to manual locking hubs as long as parts! Than a hope to fix your A/C system computer for trouble codes, if fan. A broken radiator fan not turning on, something in the control circuit is defective if is. About 220-230 to prevent overheating be something wrong with the assistance of and... Opened the hood and turned the AC automatically turns on, when A/C is activated and the temperature... Cycles on and I’m stumped could cause critical engine components to fail be leak! Diagnosis of your A/C, but it could mean that the compressor clicks on here’s a second to. The higher the pressure the higher the pressure transducer gets hot however, the system I! Hot or not hot this only takes care of the A/C system will turn with! Burnt a valve 20k later Arrgh common failures therefore are harder to.! Over the age of 50 begins to shift a bit, as your priorities tend to change 214.... The highway then the system is most likely the temperature sensor that operates the fan not. Or, it is only engaging for a car when you’re over the age of 50 to! Is more of a fuse, relay, and that motion moves the,. Motion moves the air conditioner is turned on or truck is started with AC on moving, this a! From members here kicking on with A/C on signifies an issue with the assistance of motors and capacitors behind. Power to one or both relays to turn on the highway then AC! All rights reserved ever the air-conditioning is used, regardless of engine coolant likely..

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