Both fans should run at the same time regardless if the A/C is ON or not.. Confirm fan operation by doing this: Put the Key on Position III (Ready to start the car) if the A/C is set on Cool and ON both fans should start to spin.
Full Answer
Do both fans come on when AC is on?
Both fans present in the car, the primary cooling fan from the radiator and the secondary cooling fan from the air conditioning system's condenser, should immediately turn on when AC is switched on. Turning the radiator fan on is controlled by the rise in coolant temperature.
Can I drive with one radiator fan not working?
Yes, technically your engine does not need a cooling fan to operate. Logically, however, the cooling fan keeps the cooling system at the optimal temperature to prevent the hotter than normal engine temperatures, as mentioned above.
Why does my car have 2 cooling fans?
On many vehicles, there may be two fans: a main cooling fan for the radiator, and a second fan for the condenser. Both fans should come on when the A/C is on.
When should the cooling fan come on?
about 200 degrees FahrenheitYour radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
Does the thermostat control the radiator fan?
The thermostat found in the cooling system will control many of the electric fans. When a certain preset temperature has been reached by the car engine, the radiator fan will begin to cool the engine. The fan will turn off eventually if the temperature goes below the preset engine temperature.
How can you tell if a fan relay is bad?
Bad Cooling Fan Relay SymptomsThe engine runs hot or overheats. ... The cooling fans don't work. ... The cooling fans keep running. ... Warning lights. ... Poor air conditioning performance. ... Swapping Relays. ... Measuring the Relay Coil's Resistance. ... Listening for Noises.More items...•
How do I check if my radiator fan is working?
A simple way to check if the radiator fan is working is to start your engine and turn the air-conditioning system (A/C) to the maximum speed. If the fan is spinning, then it means that the fan motor, fuse, wiring, and relay are all working properly.
What are the symptoms of a faulty cooling fan switch?
Common signs include engine overheating, the Check Engine Light coming on, and a broken or shorter signal wire.
How many cooling fans does a car have?
two radiator fansA lot of vehicles will actually have two radiator fans. One, both or neither may be running at any given time depending on the conditions. When you are cruising at highway speeds, the air rushing over the radiator and around the engine will help control the heat.
What sensor turns on the radiator fan?
coolant temperature sensorOn most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. If it's not working, the fan won't turn on when it needs to, which means the engine might overheat.
What causes cooling fans not to come on?
The most common reasons why a radiator fan is not working are due to a blown fuse, a bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged.
How do you test a cooling fan relay?
4:309:13How to Test Cooling Fan Relays - Low and High Speed - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you want to test AC relays. If you want to test grab this other one the cooling fan relays thatMoreSo you want to test AC relays. If you want to test grab this other one the cooling fan relays that we have here starter relays relays for actual you can hear it click well them. You hear that.
What happens if radiator fan does not work?
If your cooling fan stops working, your engine could overheat. This could cause damage to your engine parts. It's a serious issue and needs to be looked at by a garage.
What to do if radiator fan is not working?
How To Fix A Radiator Fan Not Coming OnCheck Fuses. The first thing you want to do when your radiator fan is not spinning is to check the fuses. ... Check Coolant Level. The next step you want to do is to check the coolant level. ... Unplug Coolant Temperature Sensor. ... Check Trouble Codes. ... Measure wirings. ... Talk to a professional.
How much does it cost to fix a radiator fan?
As one of the more expensive car repairs needed (not including the replacement of a seized car engine, obviously), the replacement of the radiator coolant fan could incur about $128 to $162 in labor costs and around $465 in parts. So, total radiator fan replacement cost could be anywhere from $592 to $627.
Can a broken radiator fan cause overheating?
Engine overheating: A bad radiator fan can cause the engine to overheat, especially at low speeds. If your car starts overheating, pull off the road as quickly as you safely can and turn off the engine. An overheated engine can quickly get ruined and lead to expensive repair bills.
How long does it take for a diesel to warm up?from forums.tdiclub.com
The thermostat keeps the coolant from going to the radiator. Diesels warm slowly. In 25 degree weather it would take 12 miles to open the thermostat on mine, on a stop and go country drive of 55 mph or less. But I would get warm air out of the heater in a few miles - warm enough to defrost with.
Can fuse be on top of battery?from forums.tdiclub.com
Fuse on top of the battery. When mine did this , I got away with simply cleaning it up , it was a corrosion mess. That was a long time ago, still working. Sometimes it will destroy the holder and/or wiring.
What happens if a fan isn't spinning?
If it isn't spinning the bearing likely died and the fan needs to be replaced.
Do case fans need to be on all times?
Case fan should be operating at all times, unless it is controlled by a PWM controller either from a separate pwm controller, or if the fan is connected to the mobo and the bios has the ability to control it.
When do Honda fans turn on?
On many Hondas, both fans turn on when the AC is first turned on and the compressor is running and temp set to low and heater/AC fan turned on.
Why does my condenser sound like it's not enough air?
Basically it sounds like not enough air flow through the condenser due to both fans not running or fins clogged with bugs or other debris.
What fuse is under the hood?
In the Under the Hood Fuse Relay box, check fuse#6 20A for Sub Fan Motor (condenser ) and fuse#7 20A for Main Fan Motor (Radiator), I believe. Page #331 in your Owner's manual.
