Q: My coolant fans is not running when ac is turned on.
WEBFrom you description, it sounds as though the system isn’t building enough pressure, and by relation enough heat to turn the cooling fans on. In other words, the system is low on refrigerant. I would confirm this by connecting A/C gauges to the system to see what the pressures are on the high and low side of the system.
Symptoms of a Bad or Failing Cooling Fan Relay - YourMechanic
WEBJan 5, 2016 · Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. The cooling fan relay is the relay that controls the engine’s cooling fans. When the ...
Symptoms of a Bad or Failing Cooling/Radiator Fan Motor
WEBJan 5, 2016 · If the cooling fan motors burn out or fail, the cooling fans will be disabled. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. If the motor fails the blades will not be able to spin or generate air flow. 2. Vehicle overheating. Another symptom of a possible problem with the cooling or radiator ...
Symptoms of a Bad or Failing AC Fan Control Module
WEBJan 6, 2016 · The cooling fans under the hood of your car are designed to keep the components of the system at a lower temperature. Usually, these fans will come on when the system gets a bit too hot and the go off once the desired temperature is reached. If you notice that the cooling fans run for a very long time without shutting off, then the A/C fan ...
Symptoms of a Bad or Failing AC Condenser Fan - YourMechanic
WEBJan 6, 2016 · This problem occurs when the condenser has gotten too hot and is no longer able to convert the refrigerant into cooled liquid form. 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. 2. Car overheating while idling
How to Buy a Good Quality Cooling/Radiator Fan Motor
WEBDec 28, 2015 · Previously, cooling fans used to be all mechanically-run - meaning the engine powered them. The problem with this type of fan is that if the engine is running at a slow speed, so is the fan. And the power required to keep the fan going means that horsepower and performance are diverted away from …
Symptoms of a Bad or Failing Cooling Fan Resistor
WEBJan 6, 2016 · The cooling fan resistor is meant to send power to the fans in steps, so that the fans may operate at different speeds. If any of the individual steps or switches fail, it will disable the cooling fans from operating on that speed setting. You may notice that the cooling fans only operate at one speed, when they used to operate on two or more. 3.
How Long Does a Cooling Fan Relay Last? - YourMechanic
WEBJan 14, 2016 · Once you turn on the air conditioning, both fans should come on. The fan turns on when the power control module (PCM) receives a signal that the temperature of the engine needs extra air flow to cool it down. The PCM sends a signal for the cooling fan relay to provide power to the cooling fan.
Best Prices for Cooling Fan Relay Replacement - YourMechanic
WEBIf the cooling fan relay is faulty, the cooling fan can continue to run unnecessarily, even when the ignition is off and the engine is cold. Conversely, the cooling fan may not run at all causing the engine to overheat. Since the cooling fan plays a factor in air conditioning performance, your air conditioning may not blow cold air.
What Is the Difference Between a Water-Cooled Engine and an Air …
WEBDec 1, 2015 · Some engines may use a hybrid design that uses a water-cooling system mixed with some of the air-cooled engine traits to help keep the engine cool and to lighten the added weight of a full-size water cooling system. These systems may use smaller radiators or thin lightweight radiators and engine designs that …