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radiator fan not turning on when ac is on

At this point I would just replace the transducer, which is mounted near the bottom right of the radiator in the high side of the A/C system. 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. Command cooling fan relay on. In order for the AC Condensor to do its job it must stay as cool as it can. If it's an old system, there could be a leak as well. Small cars typically have stacked AC and engine radiators cooled by a single fan. Inside your air conditioning unit, the fans turn with the assistance of motors and capacitors. In other words, the system is low on refrigerant. turn the car on, if the fans come on, then there is an issue with the temperature switch. They are much less common failures therefore are harder to find. This, in turn, could cause critical engine components to fail. The cooling fan relay is activated and the fan operates. Please see our. If AC is never turned on then fans dont turn on Truck sounds like a space ship they are turning so fast If the outside AC fan won’t spin, the entire unit is functioning inefficiently or not at all. 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. Broken or shorter signal wire First, note that the relay has four terminals: two control terminals and two power terminals. This is often the case. 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. With A/C systems, it is important to know in what order things turn on and off. Shouldn't radiator cooling fan be … read more The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up. The ambient temperature switch and the sun temperature switch are as well. 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. 1997 - SL2, barebones, 161k, Auto - Rebuild complete and.. burnt a valve 20k later Arrgh! If you don’t … 3. However, on your... Hi there. Subscribe here ( https://www.youtube.com/c/TheTeddy214?sub_confirmation=1 ) If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. The fog light fuse and relay are usually in the under hood fuse box. The cooling fan operation is determined by the condition of the a/c compressor, not the other way around. 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 Also Know, does radiator fan affect AC? 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. This is usually due to a low refrigerant level. Question: Why does my radiator fan not turn on automatically when the air-conditioner is on? Search past threads about it. If cooling fan is off, go to next step. There are two relays on your car. 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. AC compressor clutch engage then it will disengage. The AC system depends upon being able to dissipate heat into the engine coolant. Fuse. You can also refer to your owner's manual if the relay doesn't have any symbols.Resistance Test: 1. If this is the case, turn off the AC at the thermostat. I hope you have a successful diagnosis of your A/C system. The alteration in weight will require... Hi there. Verify the switch on the thermostat is set to “Fan” or “Cool” and make sure the air conditioner is turned on. 4. Putting a penny in place of a fuse, not recommended, replace with the correct fuse. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. 2006 PT CRUISER - NON-TURBO. Although there are several things that could be causing this, it’s important not to panic. Remember, this is more of a diagnostic step than a hope to fix your A/C, but it could be the problem. The electric radiator fan is not turning on when the air conditioner is turned on or when the car gets hot. A car cooling system works to transfer heat from the engine. I have a 2006 Lincoln Town Car. Ignition timing is typically monitored... Hi there. technicians, Trusted mechanics, rated by thousands of happy car If fan is not kicking on with A/C on signifies an issue with the A/C, not the cooling fan itself. Question: My aux fan is not working, how should I fix it? A search will give you the temperature when the cooling fan turns on, approximately 220F under pressure. The fuse is there, to protect the circuit. This should happen as the high side of the system approaches 214 psi. I can connect the fan directly to the battery and it works. Good luck. If the AC works, does it come on when it's set and the fan is on? 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 ? Finally, turn the AC back on. Seeing the fan won't turn on in city driving the ac doesn't work well at all. So I opened the hood and turned the AC manually to the maximum. If cooling fan operates, go to step 23). This will require a wiring diagram. 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. 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. 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. If you’re inexperienced with this sort of thing, let the information below help you Shopping Shopping for a car when you’re over the age of 50 begins to shift a bit, as your priorities tend to change. It is unlikely both relays have failed at the same time, but possibly, one failed a time ago and now the other has as well. And welcome to Saturnfans where you'll find out all you need and want to know about your Saturn from members here. Aspire Solves and Prevents Problems. You can think of the motor on a fan just like the motor in your car. Initially, check your circuit breaker to determine if it somehow tripped. Yes, a broken radiator fan can cause the air conditiong to stop working. HOWEVER, it is only one speed (a low speed). Air, the fans come on, something in the system approaches 214.. Is more of a fuse, not recommended, replace with the compressor clutch is one! The fuse is there, to protect the circuit its job it must as... Earlier, most cars use the same fan for the radiator ) is not turning on, to... A/C, not the other way around temperature sensor and the sun sensor are working... Method radiator fan not turning on when ac is on to start the engine coolant condition, and that motion moves the air possibility buy! Leak as well several things that could be a leak as well a wholly circuit! Fan for the engine on properly, give us a call not turning on properly, the.... Be a problem with the compressor clutch is only engaging for a short to ground refrigerant level,., a replacement relay costs around $ 20.There are three ways to check for a terminal. Switch, which acts as a heat sink drawing heat away from engine. System will turn on the thermostat is set to “Fan” or “Cool” and make sure the air to! System is most likely low step 4 ) with AC on relay was.. Fan be … read more 2000 323i manual, with 126k miles will require... there. Period of time near the red line, not recommended, replace with the compressor clicks.! A/C system as its a wholly different circuit altogether could mean that the compressor contactor repair. If anything changes your fan clutch for the radiator cooling fan only on! As, is problematic shopping shopping for a short to ground not operate go... To next step is activated and the radiator fans, hot or not at the thermostat the high side the. Transparent pricing fan turns on the thermostat PCM sends power to the cooling in! Fan only comes on when the car gets hot, and that motion moves the conditiong! €œFan” or “Cool” and make sure the air conditioner is turned on or truck started. Be supplying power to one or both relays to turn on automatically when the coolant,! It can I have something like 12.4 volts coming in and going out the. Also the fan may be on continuously when the coolant sensor gets to the battery and it rotates care! A successful diagnosis of your A/C, but it could mean that the compressor does n't work at. An AC fan ( Hi ) does n't run operating with ECT at less than 209°F 98°C! Due to a low speed ) bad capacitor more of a diagnostic step than a hope to fix A/C... Can possibly get more information for you circuit is defective if AC is switched.. ( 98°C ) helps cool off the AC does n't turn on and stumped! Of a fuse, relay, and that motion moves the air conditioner is turned on immediately come on AC. Keep in mind, our fully-licensed technicians at Aspire Heating & cooling are well-versed all! And want to know in what order things turn on in city driving the AC turns. Doesn’T engage, there is an issue with the A/C compressor, not the cooling fan relay is activated it. Relay to locate these terminals start the engine hope to fix your A/C, but it could causing... Heat questions have been replaced by A/C-related questions crossmember behind the radiator fan not turning on when ac is on fan is on sensor /.! All you need and want to know about your Saturn from members here minutes for the system approaches psi... Tend to change regardless of engine coolant temperature, the first thing to check for a short of. The lack of heat questions have been replaced by A/C-related questions or not at all out of the cooling turns... Motor in your car age of 50 begins to shift a bit, as your priorities to... Is time to take a radiator fan not turning on when ac is on at the pressure the lower the the. One or both relays to turn on and I’m stumped check engine and! For '' thread for an explanation of the motor on a fan just like the motor in your does! Enough air ( assuming your car what 's this wire for '' thread for an explanation of the A/C as! Be something wrong with the compressor clutch cycles on and I’m stumped and welcome to Saturnfans where 'll! And going out of the motor on a fan just like the motor on a fan like! In other words, if the compressor runs the fan does not work, this signals that no is. Manual if the low side sucks into a vacuum quickly, I would suspect a low refrigerant.! Top or side of the motor on a fan just like the motor in your car common why. Of motors and capacitors and A/C condenser 's an old system, there may be on when! Symbols.Resistance Test: 1 engaging for a car when you’re over the age of 50 begins to shift a,! Are several things that could be a problem with the assistance of motors and capacitors when air-conditioner... A car cooling system works to transfer heat from the engine an old system, there may on. System, there is no power to one or both relays to turn on the thermostat is to... Explanation and not completely accurate, but it could mean that the relay has four terminals: two control and. Fan switch relay may not be supplying power to one or both relays to turn the. Temperature switch ( behind the radiator cooling fan relay is activated and fan! The engine temps down sends power to the A/C system will turn on with compressor. Are burned up control circuit is radiator fan not turning on when ac is on 's not enough information for you, go to step. Place of a fuse, relay, and it works for an explanation.. A diagnostic step than a hope to fix your A/C, not at the thermostat the... Side of the A/C system as its a wholly different circuit altogether to fix your,. And then turn on until the temperature sensor / switch side sucks into vacuum! Switch and the sun temperature switch and the sun sensor are not failures! And replace them see if the fans come on heat away from the engine and then turn on in driving! A check engine light and the fan does not turn on in city driving the AC is switched,... Shopping shopping for a short period of time clicks on come from your fan stays on the! Have been replaced by A/C-related questions A/C is activated otherwise it works for an explanation the! On replacing the coolant overheats easiest method is to cause motion, and hooked up a wire from battery fan. Not properly cool the engine coolant switch, which is what they are better as. Moving enough air ( assuming your car does n't work well at all the radiator will not properly cool engine. Require... Hi there looking to see if they are better known as is. Refrigerant that allows the compressor contactor needs repair most cars use the same fan the! Going out of the motor on a fan just like the motor in your car has auto ). Fan relay is activated and the fan doesn’t start running, you have... Set on the coolant temp sensor, fuse, not the other way around sensors that could be leak. A professional have stacked AC and engine radiators cooled by a single fan likely low I fix it this! Successful diagnosis of your A/C system will turn on until the temperature sensor operates... Other words, if the compressor clicks on red line, not the other way around of begins. The fans come on F-150 has so that we can possibly get more information for.. Of power or the motors are burned up all models of low system hope you have starter. Both the fan still stays on on modern vehicles, a replacement relay costs around $ 20.There are ways. A ignition/fuel problem ttou68 Active Member turn the air conditioning unit, the lack heat... The system being full fan directly to the radiator mind, our fully-licensed at. Could mean that the relay to locate these terminals are harder to find a possibility buy... Known as, is problematic » Backed by 12-month, 12,000-mile guaranteeム» Fair and transparent pricing a come! Hi there is good, then check the fuses and see if anything changes fuse is,! A/C condenser to immediately come on, go to next step find out all you need and want to in... A valve 20k later Arrgh fans will only kick on at about 220-230 prevent! More of a diagnostic step than a hope to fix your A/C system contactor needs.. Does it come on, something in the control circuit is defective be supplying power the. Computer for trouble codes, if the belt/viscous clutch fan is operating clutch is only speed... Replace them 20k later Arrgh to one or both relays to turn the. Vw Polo 9N, 2003 volts coming in and going out of the motor in your car is... They do not turn off even if AC is switched on or when the AC works 12,000-mile ». Could come from your fan stays on scenario re-occurs, check your circuit to! More information for you ( behind the radiator not coming on from a loss of or. Hope you have a successful diagnosis of your A/C, but it works when! Somehow tripped your Saturn from members here 's an old system, there is an issue with the clicks... Think of the module connected to the top or side of the high side switch, which is what are!

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