Even if the issue is small, your AC would have got a complete checkup to prevent any more further concerns. I just moved into a house. As long as there is 120 vac going to the motor then it should run. But the best course of action is to get an HVAC expert to check the problem for you. Engine cooling fans are temperature controlled to only run when needed. Bad condenser fan should be suspected if the car overheats with the AC on and is idling. I found the cooling fan runs at a high speed all the time when the car is on and running. 2. AC compressor not working but fan is running, this may cause you some discomfort and concern. Ambient temp is 25 C. The condenser fan runs with a/c for about 5 seconds then fan cuts out. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. This sensor switches the cooling fan off and on as needed. I swapped each corresponding one and fired up the car, no changes. In most cases, the ideal temperature is around 150 degrees Fahrenheit. There are a few likely causes that are to blame when a condenser fan motor overheats. Recently I have noticed my radiator fan stays on full blast after the car is shut off and my keys are out of the ignition. When exactly this happens is different for different cars. A radiator fan has an important role of keeping a vehicle's engine cool. Radiator fans stay on after car shuts off So I own a 2008 Volkswagon Jetta 2.5l with 120k miles . Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. Don’t wait for an issue to escalate, at the first sight of it book an appointment with an Unclear if the ECT (coolant temp sensor) is malfunctioning. The central heat and air unit is 2 years old. I can run the car at idle minu … read more 3. The condenser fan should cut in when the compressor starts, that is when the pressure is low. Window-box air conditions are, however, an exception. Maintaining the condenser fan motor can help to prolong the life of the AC compressor. The cooling fan in a Toyota has a relay to regulate when power is provided to the fan. After inspecting Condenser fan motor observed it to be running at half the speed. (30th December 2008, 20:09 #10: toiingg. The pressure goes back up to 20 bar and the fan cuts in again. This will allow it to pull the air across the compressor so that it does not overheat. But if it is supposed to be that way, that means it's something else. If it stops working, your engine could overheat and be damaged. There’s no reason why the fan should run for hours on end. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. BHPian . Condenser fan motors all have a temperature stipulated by the AC manufacturer at which it can operate safely and problem-free. Or you can do some simple cooling fan troubleshooting as well. Carefully check the distributor cap's central and outer terminals and the rotor's tip. That leads me to believe that the condensor fan and/or the radiator fan is not running to blow cool the refrigant. I have replaced the thermostat, the cooling fan switch, and done a coolant flush. I have a 1993 Accord LX with a manual transmission. The engine fan shouldn't come on right away because the goal is for the car to warm up as soon as possible. The fan continues to run at its maxiumum speed, regardless of the engine temperature. What Causes Condenser Fan Motor Overheating? To test the condenser fan (the one on the right side, facing the car) unplug the electrical connector at the motor and use jumper wires to connect the fan directly to the battery. I checked each relay associated with rad fan or condenser fan and each has neighboring relay with the same specs. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. This problem existed before and after the radiator was replaced. If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. This helped the situation. As the fan is designed to prevent the condenser from ever getting this hot, warm air from the vents is one of the first signs that the fan may not be cooling the condenser. An overheated condenser can affect the overall engine temperature thereby causing overheating. The condenser fan motor is what runs to turn the fan blades and blow air across the condenser coil, where it cools the refrigerant from a hot gas into a liquid. The name on the thermostat inside is honeywell and it also says heat pump on it. 8 Tricks On What To Do When Your Car Starts To Overheat . The AC fan should start when you turn on the AC. However, if your fan … If the AC is off, the fans don't turn on until the engine heats up to a preset level. A/C condenser is a radiator positioned between the car’s grille and the radiator for the motor. *Professional scanner* can run functional test on cooling fan for circuit check in each speed mode and command fan to run in each .. plus it can see what inputs the fan is getting from PCM and show results in live data.... That is the BEST way to check it out! If you are near the condenser unit and it feels hotter than usual, it indicates that the fan motor may be overheating. It is what sends the signal for the fan. The condenser fan is more likely to run when the car is idling. 2010 Ford F150, Radiator fan seems to be running on high more than it should. I have noticed that the fan visible from the top of the unit is not blowing when the heat is on. Before we begin, it’s important to have a good understanding of the air conditioning system. Your cooling fan comes on when the car reaches a particular temperature. The trigger is the thermostat in the radiator of your vehicle. Photo courtesy of Dennis Bratland on Wikimedia. Cooling fans stay on at all times. The AC is OFF. So if it NEVER comes on when idling you definitely have a problem. In my car, if the AC is on, the fans switch on at the ON position of the ignition (the position where your next twist cranks the engine). The air is re-circulated from the condenser back to the furnace, where it is turned into cool air and disbursed through ducts and vents into the rooms. The high pressure side of my a/c is running at between 15 to 20 bar. A failed sensor can cause the fan to run excessively or not run when cooling is needed. Even kicks on when its a cooler day. In the condenser, the gaseous refrigerant sheds heat and returns to a … The AC was blowing warm. A/C or Heat Pump Fan Condenser Unit Fan diagnostic questions & answers - FAQs: Questions & answers help diagnose problems with the air conditioner or heat pump condenser unit fan: fans that won't start running, won't stop running, hum, click, buzz, or run intermittently utlimately lead to loss of heating or cooling. Low pressure is 2 bar. But the engine fan will come on only when the computer tells it to. How does a car’s cooling fan work? They don't even wait for the engine to start running. Also stays on when driving down the highway. The ECT seems to keep the fans off until engine is warm about 10-12 minutes after a cold start. A simple test can help you do some quick circuit checks, if necessary. Location: Calcutta. This fan returns warm air to the condenser (which is the big unit outdoors). The on/off cycling time is about 8-10 secs on/off but this can and does vary. ANSWER Edward, The condenser fan motor should be operational when the compressor is running. My car does, and did not, overheat. A fan that runs continuously typically means there’s a bigger issue. These two parts work together to cool your home, but don’t always turn on and off at the same time. The radiator and condenser are BRAND NEW. The fan in your AC system can run separately from the cooling component of your AC. Yesterday my boyfriend pushed the fan a little and it started running. However, a broken fan could be confused with a fan that simply has not kicked in yet. If you have two fans. Usually, electric fans will activate shortly after the air conditioner is turned on, this is done to dissipate the extra heat produced in the condenser while the air conditioner is in operation. Problem for you started running as long as there is 120 vac to. Years old seems to be that way, that means it 's something else single fan from top. 5 seconds then fan cuts in again and operating properly cool the.... 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