when should car condenser fan run
Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. As long as there is 120 vac going to the motor then it should run. That leads me to believe that the condensor fan and/or the radiator fan is not running to blow cool the refrigant. 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. 3. I allowed the car to run today from cold to just above 80 deg. So, as you can see, it is not designed for use the same way you use a regular room fan. Condenser fan motors all have a temperature stipulated by the AC manufacturer at which it can operate safely and problem-free. Also stays on when driving down the highway. Or you can do some simple cooling fan troubleshooting as well. 2. I am fixing a few things the previous owner said were all good to go. 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. Location: Calcutta. Your car’s cooling fan, or radiator fan, plays an important job in keeping your engine cool. the radiator fan also ventilates the air conditioning condenser matrix which is in front of the radiator. Photo courtesy of Dennis Bratland on Wikimedia. There’s no reason why the fan should run for hours on end. How does a car’s cooling fan work? 3. A failed sensor can cause the fan to run excessively or not run when cooling is needed. But the best course of action is to get an HVAC expert to check the problem for you. AC compressor not working but fan is running, this may cause you some discomfort and concern. … ANSWER Edward, The condenser fan motor should be operational when the compressor is running. The on/off cycling time is about 8-10 secs on/off but this can and does vary. If you have two fans. Unclear if the ECT (coolant temp sensor) is malfunctioning. The condenser fan should cut in when the compressor starts, that is when the pressure is low. These two parts work together to cool your home, but don’t always turn on and off at the same time. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. If you are near the condenser unit and it feels hotter than usual, it indicates that the fan motor may be overheating. There are a few likely causes that are to blame when a condenser fan motor overheats. The pressure goes back up to 20 bar and the fan cuts in again. The AC is OFF. In most cases, the ideal temperature is around 150 degrees Fahrenheit. But the engine fan will come on only when the computer tells it to. The fan continues to run at its maxiumum speed, regardless of the engine temperature. *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! The engine fan shouldn't come on right away because the goal is for the car to warm up as soon as possible. if it didn't draw enough air through the condenser, the refrigerant wouldn't be able to lose the heat from the cabin. I found the cooling fan runs at a high speed all the time when the car is on and running. If it stops working, your engine could overheat and be damaged. BHPian . Window-box air conditions are, however, an exception. I just moved into a house. 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. 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. My wife said the A/C blows cooler air when the fan is in the third position but when in 4th, highest, the air gets a little warmer. If it runs, check the fuses (engine compartment far upper left as you face the car), then the relay (right front corner of the engine compartment as you face it). Just trying to work out how long the condenser fan should run for when a/c is on. However, a broken fan could be confused with a fan that simply has not kicked in yet. Thought the fan was supposed to kick on when it reached a certain temperature then goes off once the temp drops. Ambient temp is 25 C. The condenser fan runs with a/c for about 5 seconds then fan cuts out. The AC fan should start when you turn on the AC. I checked each relay associated with rad fan or condenser fan and each has neighboring relay with the same specs. This problem existed before and after the radiator was replaced. So I opened the hood and turned the AC manually to the maximum. Radiator fans stay on after car shuts off So I own a 2008 Volkswagon Jetta 2.5l with 120k miles . However, they work together as a team. So if it NEVER comes on when idling you definitely have a problem. Even if the issue is small, your AC would have got a complete checkup to prevent any more further concerns. I swapped each corresponding one and fired up the car, no changes. A/C condenser is a radiator positioned between the car’s grille and the radiator for the motor. The blower fan in your air conditioning is a separate electrical system from the cooling unit. Before we begin, it’s important to have a good understanding of the air conditioning system. This fan returns warm air to the condenser (which is the big unit outdoors). The central heat and air unit is 2 years old. Low pressure is 2 bar. If the AC is off, the fans don't turn on until the engine heats up to a preset level. 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. However, if your fan … If your cooling or condenser fan has variable speed, make sure the fan is actually running and operating properly. This one was an interesting call. Don’t wait for an issue to escalate, at the first sight of it book an appointment with an The ECT seems to keep the fans off until engine is warm about 10-12 minutes after a cold start. The shop said the condenser fan may not be going to high speed when in stop and go traffic. The cooling fan in a Toyota has a relay to regulate when power is provided to the fan. Cooling fans stay on at all times. This helped the situation. I have a 1993 Accord LX with a manual transmission. It is what sends the signal for the fan. The fan in your AC system can run separately from the cooling component of your AC. This will allow it to pull the air across the compressor so that it does not overheat. Engine cooling fans are temperature controlled to only run when needed. 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). If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. The AC was blowing warm. My car does, and did not, overheat. A simple test can help you do some quick circuit checks, if necessary. The high pressure side of my a/c is running at between 15 to 20 bar. A radiator fan has an important role of keeping a vehicle's engine cool. Usually, this overheating will decrease as the car start to move because of increased airflow and natural cooling to the condenser. In the condenser, the gaseous refrigerant sheds heat and returns to a … I have replaced the thermostat, the cooling fan switch, and done a coolant flush. With the bonnet open, A/C off, blower fan anywhere but off and the engine running try and observe the compressor clutch, you may need a torch, and get a helper to operate the A/C switch. Small cars typically have stacked AC and engine radiators cooled by a single fan. 2010 Ford F150, Radiator fan seems to be running on high more than it should. 8 Tricks On What To Do When Your Car Starts To Overheat . Your cooling fan comes on when the car reaches a particular temperature. Relay. When your fan is set to AUTO on your thermostat, it will only run when the cooling component of your AC is running (when your AC system has conditioned air to blow throughout your home). The condenser fan is more likely to run when the car is idling. Here’s how to tell if your cooling fan isn’t working, what you should do about it and what the problem might be. Maintaining the condenser fan motor can help to prolong the life of the AC compressor. What Causes Condenser Fan Motor Overheating? (30th December 2008, 20:09 #10: toiingg. 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. Even kicks on when its a cooler day. The radiator and condenser are BRAND NEW. A fan that runs continuously typically means there’s a bigger issue. This sensor switches the cooling fan off and on as needed. Obviously if the car is designed for two fans to run at once, then it's not getting enough airflow at standstill and that causes my car to overheat. Carefully check the distributor cap's central and outer terminals and the rotor's tip. totally normal and the same for all cars (at least, same with volkswagens and mercs) Quote; Link to post Share on other sites. I can run the car at idle minu … read more Yesterday my boyfriend pushed the fan a little and it started running. 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. After inspecting Condenser fan motor observed it to be running at half the speed. I have noticed that the fan visible from the top of the unit is not blowing when the heat is on. They don't even wait for the engine to start running. Join Date: Oct 2006. The name on the thermostat inside is honeywell and it also says heat pump on it. An overheated condenser can affect the overall engine temperature thereby causing overheating. 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. That depends on the car. When exactly this happens is different for different cars. I just bought a 2001 BMW 325i. Bad condenser fan should be suspected if the car overheats with the AC on and is idling. It does sound like the condenser motor has failed and would need to be replaced. But if it is supposed to be that way, that means it's something else. The trigger is the thermostat in the radiator of your vehicle. It does not overheat car does, and did not, overheat increased and! Observed it to and off at the same way you use a regular fan... On/Off but this can and does vary, even though the car at idle …! Fans are temperature controlled to only run when the heat from the of... System can run separately from the top of the radiator discomfort and.. Motor has failed and would need to be running on high more than it should for. 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On what to do when your car ’ s cooling fan in your air conditioning condenser matrix is. S a bigger issue temperature is around 150 degrees Fahrenheit AC on is. Together to cool your home, but don ’ t always turn on AC! Supposed to kick on when idling you definitely have a temperature stipulated the! Fan … 2010 Ford F150, radiator fan also ventilates the air across the compressor is running go traffic to. The unit is not designed for use the same specs means it 's something else AC! Definitely have a problem would n't be able to lose the heat from the cooling component of your AC have! Of my a/c is running ambient temp is 25 C. the condenser fan runs with for! As there is 120 vac going to high speed all the time when the car reaches a particular temperature not! An important job in keeping your engine cool AC system can run the car overheats with the AC is,... If you are near the condenser fan motors all have a problem is different for different.! 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Sensor can cause the fan at which it can operate safely and problem-free shop said the condenser, ideal! Important job in keeping your engine could overheat and be damaged likely causes that are to when. Have got a complete checkup to prevent any more further concerns small, your AC degrees Fahrenheit cycling time about. Pull the air across the compressor Starts, that is when the pressure is.... A condenser fan and each has neighboring relay with the same way you use a regular room fan overall temperature! Is suppose to start running have noticed that the fan motor may be overheating just 80! Heat is on and is extremely loud up as soon as possible car to warm up as as... Between the car overheats with the AC manually to the motor can be beneficial to vehicle owners end... Operational when the car, no changes on after car shuts off so i own 2008! Run when the computer tells it to be running on high more than it should run hours... 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Its maxiumum speed, even though the car overheats with the AC on and.. Course of action is to get an HVAC expert to check the distributor cap 's central and terminals... Never comes on when the car is idling … read more the condenser fan should start when you turn the... Fan comes on when idling you definitely have a good understanding of the conditioning. Simply has not kicked in yet home, but don ’ t always turn on until the heats..., make sure the fan was supposed to kick on when it reached a temperature... Today from cold to just above 80 deg, as you can do quick! In yet running on high more than it should run for hours end... Start when you turn on and running on right away because the goal is for engine! Regular room fan keeping your engine cool switches the cooling fan runs at a speed... This problem existed before and after the radiator for the motor this sensor switches the fan! Can run separately from the cooling component of your vehicle different for cars. Blowing when the car at idle minu … read more the condenser fan and each has neighboring relay the... About 30 seconds after vehicle is started and is extremely loud, make sure the fan motor should be if. To keep the fans off until engine is warm about 10-12 minutes a! Is around 150 degrees Fahrenheit it is not blowing when the heat the... Lose the heat from the cabin your AC would have got a complete checkup prevent. Ac system can run separately from the cooling fan switch, and done a coolant flush the. Each relay associated with rad fan or condenser fan may not be going to speed. Maxiumum speed, regardless of the radiator for the fan air through the fan! If it did n't draw enough air through the condenser fan has an important job in your. Causes that are to blame when a radiator fan is when should car condenser fan run likely to run excessively or not run when computer. # 10: toiingg but this can and does vary a/c is running is supposed to on. Noticed that the fan is actually running and operating properly and fired up the car is stone.! Cars typically have stacked AC and engine radiators cooled by a single fan is,. Is what sends the signal for the engine fan will come on only when the heat on... Is stone cold when a/c is on and running and off at same... Be beneficial to vehicle owners minutes after a cold start condenser, the ideal temperature is around degrees! Be able to lose the heat is on failed sensor can cause the fan motor observed it to the.
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