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radiator fan not turning on when ac is on

Was this answer helpful? The easiest method is to start the engine and then turn on the air conditioning. If AC is never turned on then fans dont turn on Truck sounds like a space ship they are turning so fast The loud sound could come from your Fan Clutch for the same reason your fan stays on. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature. Your car doesn't overheat, that's why, your AC fan (HI) doesn't turn ON. HOWEVER, the radiator fan does not turn on with the compressor. There are a few common reasons why your radiator fan is not turning on. 3. Whenever something electrical doesn’t work, the first thing to check is the fuse. It only comes on when temperature rises to operating range. Made with ♥ in Silicon Valley. So I opened the hood and turned the AC manually to the maximum. Bingo, after a while BOTH radiator fan and condensor fan stopped running (high speed or low), and then for 30 sec of so, they will try to spin … The ambient temperature sensor and the sun sensor are not common failures. 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. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator. 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. 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. ttou68 Active Member Yes, a broken radiator fan can cause the air conditiong to stop working. In other words, if the compressor runs the fan runs. document.write(new Date().getFullYear()) 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. Verify the switch on the thermostat is set to “Fan” or “Cool” and make sure the air conditioner is turned on. Finally, turn the AC back on. Fans come on whenever AC is switched ON or truck is started with AC ON. Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing. Turning on the AC automatically turns on the radiator fans, hot or not hot. 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. The ambient temperature switch and the sun temperature switch are as well. 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. 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. Is this only on the saturn. Answer: Check that you still have refrigerant in the system. This is often the case. 1997 - SL2, barebones, 161k, Auto - Rebuild complete and.. burnt a valve 20k later Arrgh! AC compressor clutch engage then it will disengage. The trouble code indicated the cooling fan relay was faulty. If your coolant level is low there is a chance that you will get air in the system … 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. I can connect the fan directly to the battery and it works. Or, it could mean that the compressor contactor needs repair. technicians, Trusted mechanics, rated by thousands of happy car The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. My car has 234565 miles. Circuit Breaker is Tripped. Had a problem with the Air conditioner (AC) radiator cooling fan in my VW Polo 9N, 2003. google_ad_slot = "4972140983"; 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 Just keep in mind, by replacing the auto hubs with manual hubs, you will have to get out of the... Hi there.