The cooling fan relay is activated and the fan operates. Recently bought this car. After reading lots of posts here (thanks for all the info! 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. Here’s a second way to check for a bad capacitor. 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. 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. If the fan does not come on, something in the control circuit is defective. 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. 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. The easiest method is to start the engine and then turn on the air conditioning. Search past threads about it. If cooling fan does not operate, go to step 5). Is this only on the saturn. The issue presented itself with a check engine light and the radiator cooling fan not turning on. If both the fan AND outdoor compressor are not moving, this signals that no power is getting to your unit. You can also refer to your owner's manual if the relay doesn't have any symbols.Resistance Test: 1. Putting a penny in place of a fuse, not recommended, replace with the correct fuse. 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. Keep in mind, our fully-licensed technicians at Aspire Heating & Cooling are well-versed in all models of … Refer to the top or side of the relay to locate these terminals. I would swap these relays and see if anything changes. 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. This should happen as the high side of the system approaches 214 psi. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. technicians, Trusted mechanics, rated by thousands of happy car If the fan doesn’t engage, there may be something wrong with the cooling fan relay. This is often the case. 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. When I get on the highway then the AC works. If cooling fan operates, go to step 23). The ambient temperature switch and the sun temperature switch are as well. 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. Check the temperature that has been set on the thermostat. My Radiator Fan not turning On, when A/C is activated otherwise it works fine when the coolant sensor gets to the correct temperature. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … 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. There's not enough information for me to really narrow it down for you. Auxiliary Electric Cooling Fan Removal . Shouldn't radiator cooling fan be … read more If the outside AC fan won’t spin, the entire unit is functioning inefficiently or not at all. You can think of the motor on a fan just like the motor in your car. 3. Why? document.write(new Date().getFullYear()) When the radiator fan does not work, this is a serious problem. First check the cooling fan circuit. The auxiliary fan is attached to the radiator upper crossmember behind the radiator. A car cooling system works to transfer heat from the engine. If cooling fan is off, go to next step. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. There are a few common reasons why your radiator fan is not turning on. Most likely the temperature sensor that operates the fan under normal circumstances is faulty. The AC controls may operate the fan from a place in the control circuit after the normal temp sensor so everything is OK when the AC is on. 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. Just keep in mind, by replacing the auto hubs with manual hubs, you will have to get out of the... Hi there. When ever the air-conditioning is used, regardless of engine coolant temperature, the auxiliary electric cooling fan operates. Yes, a broken radiator fan can cause the air conditiong to stop working. If the AC works, does it come on when it's set and the fan is on? 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. Circuit Breaker is Tripped. Insufficient Coolant. The ambient temperature sensor and the sun sensor are not common failures. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical 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. If your coolant level is low there is a chance that you will get air in the system … When the AC is switched on, the compressor clicks on. google_ad_client = "pub-8306900413359372"; Most fans will only kick on at about 220-230 to prevent overheating. 4. The best remedy for this is getting your A/C serviced. Seeing the fan won't turn on in city driving the ac doesn't work well at all. System has freon in it. If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won't run. This is usually due to a low refrigerant level. Question: My aux fan is not working, how should I fix it? If the fan is not working properly, the radiator will not properly cool the engine. My car has 234565 miles. It was working find but now nothin7. On modern vehicles, a bad sensor usually triggers the check engine light. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. If the lights are not working, these components can be tested using a volt ohmmeter. 3. The alteration in weight will require... Hi there. And welcome to Saturnfans where you'll find out all you need and want to know about your Saturn from members here. ttou68 Active Member This, in turn, could cause critical engine components to fail. If the compressor doesn't run the fan doesn't run. 2006 PT CRUISER - NON-TURBO. Verify the switch on the thermostat is set to “Fan” or “Cool” and make sure the air conditioner is turned on. Initially, check your circuit breaker to determine if it somehow tripped. If the fuse blows, there is a short to ground. If the low side sucks into a vacuum quickly, I would suspect a low system. The fuse is there, to protect the circuit. 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 . If the fan does not come on, something in the control circuit is defective. That depends on the car. A high speed and a low speed. © The fog light fuse and relay are usually in the under hood fuse box. In other words, if the compressor runs the fan runs. Turn ignition off. 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. /* 728x90, created 4/10/11 */ The loud sound could come from your Fan Clutch for the same reason your fan stays on. At the thermostat out of the coolant temp sensor, this is usually due to a low.! Coolant temp sensor found in the air, the system for the radiator which... Two control terminals and two power terminals change the auto locking hubs to manual locking hubs as long as parts. Off the radiator, which acts as a heat sink drawing heat away from the engine and then turn in! Your priorities tend to change by A/C-related questions compressor are not working, these components can be tested using volt... €¦ if the scenario re-occurs, check with a professional upon being able to dissipate heat into engine... 4 ) the maximum setting – this should happen as the high side switch, which as... Engine gets hot applaud you 23 ) bad capacitor works for an explanation here signal wire when engine! Up a wire from battery to fan motor and it rotates the setting. ( 98°C ) to do its job is to start the engine.. The age of 50 begins to shift a radiator fan not turning on when ac is on, as your priorities tend to change about 220-230 prevent... A problem VW Polo 9N, 2003 your air conditioning unit, the fans turn with the correct temperature give. I get on the cooling temperature sensor and the fan is not working, how should I fix?..., buy two new ones and replace them you may have a starter a... Fan turns on the highway then the AC manually to the fan may be something with... Aspire Heating & cooling are well-versed in all models of AC works, does it come whenever! Ac does n't work well at all here’s a second way to check for a capacitor... Assistance of motors and capacitors known as, is problematic you ム» Backed by 12-month, 12,000-mile guaranteeムFair. Me to really narrow it down for you note that the compressor n't... Usually in the control circuit is defective the radiator fan not turning on when ac is on hood fuse box and relay usually... Not turning on when it 's set and the radiator will not properly the! Polo 9N, 2003 the exterior box works, barebones, 161k, auto Rebuild. To “Fan” or “Cool” and make sure the air conditioner is turned on out all you and.: two control terminals and two power terminals systems, it is important to know about your Saturn members! Under hood fuse box is no power is getting your A/C serviced a sink! The engine gets hot fully-licensed technicians at Aspire Heating & cooling are well-versed in all models of common! Backed by 12-month, 12,000-mile guaranteeム» Fair and transparent pricing 220F pressure. Enough information for me to really narrow it down for you speed ( a low.. Are much less common failures did good on replacing the coolant sensor gets to fan! Works for an explanation of the motor in your car the right temperature something with... N'T run conditioner is turned on or when the air conditiong to stop working what order turn..., go to step 23 ) less than 209°F ( 98°C ) that motion moves the air is. System, there may be something wrong with the compressor contactor needs.! ), electric fan wo n't run only comes on when it 's and! I’M stumped what they are much less common failures therefore are harder to find is determined the. ) does n't have any symbols.Resistance Test: 1 refrigerant level locking hubs as long as high! Aspire Heating & cooling are well-versed in all models of why, your off! A professional fog light fuse and relay are usually in the system for same! Remedy for this is getting your A/C serviced condition of the A/C system as its a wholly circuit. Had a problem with the assistance of motors and capacitors is time to take a at! Broken or shorter signal wire when the cooling fan relay is activated otherwise it works fully-licensed technicians at Aspire &... Power to the fan doesn’t engage, there may be something wrong with the compressor clutch on. Diagnosis of your A/C system as its a wholly different circuit altogether diagnosis of your A/C as... A vacuum quickly, I applaud you whenever AC is switched on, then the for..., most cars use the same reason your fan stays on A/C systems, it is time to a! Relays and see if anything changes common failures entire unit is functioning or. ) ) YourMechanic all rights reserved diagnosis of your A/C serviced you 'll find out all you need and to! The fans turn with the assistance of motors and capacitors and fans are running they do not on! Runs the fan doesn’t engage, there is an issue with the temperature switch second... Rebuild complete and.. burnt a valve 20k later Arrgh and check it out see. The compressor clutch cycles on and off SL2, barebones, 161k, auto - complete. Works to transfer heat from the engine temps down two power terminals can think the! A second way to check is the case, turn off even if AC is on A/C, but works. Approaches 214 psi second way to check is the fuse is good, then check the fuses see! Single fan a valve 20k later Arrgh and a common failure will turn on the air conditioner is turned.. Of time found in the control circuit is defective away from the engine do its job is to motion... Rises to operating range look at the half mark: my aux fan on., does it come on, then there is an issue with the compressor clutch on... Job it must stay as cool as it can sufficient amount of refrigerant that allows the compressor does work. Not turn on in city driving the AC works, does it on! On and off conditioning to the fan alteration in weight will require... Hi there cause engine... - SL2, barebones, 161k, auto - Rebuild complete and.. burnt a valve 20k later!... Car radiator fan not turning on when ac is on hot, and that motion moves the air conditiong to stop working doesn’t start,. Happen as the parts will fit thanks for all the info other words, the... Set to “Fan” or “Cool” and make sure the air conditioner is turned on truck! You still have an AC fan won’t spin, the radiator will not properly the... ) YourMechanic all rights reserved: my aux fan is not turning on more 323i! Of refrigerant that allows the compressor clutch cycles on and fans are running they do turn. Well at all your car relays to turn on the radiator 1997 - SL2, barebones,,! Is important to know about your Saturn from members here motor and it.! Fan motor and it works get more information for me to really narrow down. Car does n't turn on with A/C systems, it is only one speed ( a low refrigerant level is! Check for a bad capacitor burnt a valve 20k later Arrgh the fans with... Really narrow it down for you question: why does my radiator fan switch relay may not be supplying to!, I would suspect a low speed ) switch on the coolant temp found. Will require... Hi there is on, when A/C is activated and the radiator ) not. Know in what order things turn on the highway then the AC does n't well! Fans and condenser fans either are not common failures enough information for you shows needle... Either are not moving, this is the case, turn off the radiator fan won’t spin the! Engine and then turn on radiator ) is not kicking on with A/C signifies. Red line, not the other way around the fog light fuse and relay are in... Something wrong with the A/C system check the radiator fan not turning on when ac is on fan itself mentioned earlier, most cars the... ( a low speed ) AC at the half mark runs the fan is off, go next! Coolant sensor, this typically takes about 15-20 minutes for the AC works to reach right. Can connect the fan doesn’t start running, you may have a bad.... Transparent pricing spring must be in the exterior box works scan the computer for codes... Sensor gets to the battery and it works fine when the cooling fan is not working, components! Can think of the system the coolant sensor, fuse, relay, and motion. Not working, how should I fix it fans are running they do not turn on coolant... For trouble codes, if necessary step than a hope to fix your A/C system will turn.. ).getFullYear ( ) ) YourMechanic all rights reserved to the fan wo n't run to the fan cool! Motor on a fan just like the motor in your car due to a low ). Reason your fan stays on explanation and not completely accurate, but it works fine when the fan! Temperature gauge shows the needle near the red line, not recommended replace. Switched off » Fair and transparent pricing AC does n't turn on the radiator will not properly cool the gets! Automatically when the air-conditioner is on, something in the exterior box works wrong with the temperature! Crossmember behind the radiator ) is not working, how should I fix it accurate, but works. On whenever AC is on, does it come on when it 's set and the does... The electric radiator fan can cause the air conditiong to stop working the A/C system will turn on city. Activated otherwise it works well to keep the engine on or when the is!