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. They are much less common failures therefore are harder to find. 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 Circuit Breaker is Tripped. Set the ⦠No overheating problem at all. If necessary, a replacement relay costs around $20.There are three ways to check for a bad terminal. Insufficient Coolant. Command cooling fan relay on. I can connect the fan directly to the battery and it works. If your coolant level is low there is a chance that you will get air in the system ⦠In other words, the system is low on refrigerant. If it exceeds this amount of pressure and the system doesnât turn on, one of the sensors in the system that the PCM uses to know when to turn the system on and off has failed. I hope you have a successful diagnosis of your A/C system. 3. Also the Fan may be on continuously when the AC is operating. See your "what's this wire for" thread for an explanation of the coolant temp sensor found in the radiator. The higher the pressure the higher the temperature, the lower the pressure the lower the temperature. You can think of the motor on a fan just like the motor in your car. When I get on the highway then the AC works. Is this only on the saturn. Let us know what engine size your F-150 has so that we can possibly get more information for you. 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 ⦠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. 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. The alteration in weight will require... Hi there. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. When I get on the highway then the AC works. 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. /* 728x90, created 4/10/11 */ When the a/c is turned on and no compressor is heard/no cooling is felt then the cooling fan isn't needed so its left off automatically. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. Turn the air conditioning to the maximum setting â this should spark the cooling fan to immediately come on. 4.5K views And welcome to Saturnfans where you'll find out all you need and want to know about your Saturn from members here. Ireplaced the Coolant Temp Sensor, Fuse, Relay, and hooked up a wire from battery to fan motor and it rotates. Its job is to cause motion, and that motion moves the air. If the high side spikes and the fans donât 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. You can think of the motor on a fan just like the motor in your car. 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. 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. The cooling fan relay is activated and the fan operates. Because as was mentioned earlier, most cars use the same fan for the radiator and A/C condenser. Answer: Check that you still have refrigerant in the system. If the lights are not working, these components can be tested using a volt ohmmeter. When ever the air-conditioning is used, regardless of engine coolant temperature, the auxiliary electric cooling fan operates. Inside your air conditioning unit, the fans turn with the assistance of motors and capacitors. Turn ignition on, with engine off. However, on your... Hi there. 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. The fog light fuse and relay are usually in the under hood fuse box. The electric radiator fan is not turning on when the air conditioner is turned on or when the car gets hot. 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. Suddenly itâs 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. From your description, it sounds as though the compressor clutch is only engaging for a short period of time. Fuse. When AC is on, Radiator fan does not come on. There's not enough information for me to really narrow it down for you. Made with ♥ in Silicon Valley. So I opened the hood and turned the AC manually to the maximum. Yes, a broken radiator fan can cause the air conditiong to stop working. 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. If you have made it this far, I applaud you. Why? The transducer is another story. technicians, Trusted mechanics, rated by thousands of happy car Putting a penny in place of a fuse, not recommended, replace with the correct fuse. 2000 323i manual, with 126k miles. Testing of the high side switch, which is what they are better known as, is problematic. The trouble code indicated the cooling fan relay was faulty. Donât 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. You can change the auto locking hubs to manual locking hubs as long as the parts will fit. First, note that the relay has four terminals: two control terminals and two power terminals. If you donât ⦠HOWEVER, it is only one speed (a low speed). When the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). google_ad_width = 728; I have a 2000 Dodge Grand Caravan that has 195,000 miles. Shopping Shopping for a car when youâre over the age of 50 begins to shift a bit, as your priorities tend to change. If you are satisfied that the thermostat settings are correct, check your ⦠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. Using scan tool, check if cooling fan is operating with ECT at less than 209°F (98°C). If cooling fan is off, go to next step. 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. When the AC is switched on, the compressor clicks on. Most likely the temperature sensor that operates the fan under normal circumstances is 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 the switch is unplugged the ground will go away and the relay will close, (normally closed relay), (normally closed switch). 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And want to know about your Saturn from members here be ⦠read more 2000 manual... Failures therefore are harder to find be a problem with the compressor clutch is only one speed ( a system... Needle near the red line, not the cooling fan is on, when A/C is and... The AC is on and check it out to see if anything.... Control terminals and two power terminals from battery to radiator fan not turning on when ac is on motor and it works for explanation.
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