Why is my engine cooling fan not working?
Your engine cooling fan, only runs when needed to help cool the engine. So, a engine cooling fan, relay or control circuit failure is bad news. Because, it can allow the engine to overheat. The engine coolant sensor or a separate engine temperature switch, is used to monitor engine temperature.
Why are the fans not running in my Honda?
Lift bonnet/hood then check and see if fans are running, both should be. Do not assume because they aren’t that your fans are bad. It could be a temp sensor failure. Was this answer helpful? Yes its done, Interior fan all the way on, AC on. Engine on, in neutral or park handbrake/E brake on. Both fans are On /Off a few seconds only.
Why is my Honda Civic radiator fan not working?
I am using 2004 honda civic 2004 car, radiator fan and cooler fan not working, ac also not working, i checked fuses those are ok, and fan conditions ok ( checked directly from battery , i did short cooling sensor connector pins but no results where is problem how can i get results ? ple help me on this issue Answered!
Why does my car overheat when I Turn on the fan?
The cooling fan, which is behind the radiator grille, removes heat from the engine’s coolant. This fan is electrically controlled and relies on the signal from the onboard computer. If the fan receives a false signal, the fan might not turn on, causing the engine to overheat.
Why are the cooling fans not working on my car?
Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running. A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices.
Can a car cool with the engine off?
There probably would be nothing wrong with letting the engine cool “by itself” (which is what happens if the design removes power from the fan when the ignition is off), but since the normal operation of most cars is to run the fan when the water temperature exceeds a set threshold, it does so even with the engine off.
Why is the Check Engine light on and Engine Fan continues to run?
Q: Engine fan continues to run, Check Engine light on, and coolant leaks. Engine fan comes on about eight seconds after the car starts and won’t go off. The temperature gauge stopped working and the Check Engine light came on. Coolant is also leaking from the engine. I changed the coolant sensor, but nothing changed.
Why does my Honda Civic fan not run?
With the jumper attached, the fan should run continuously when the ignition is in the “ON” position. If the fan does not run, this is an indication that the thermo switch is faulty. If this is the case, you will need to replace the thermo switch. Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing.
How to test if your engine radiator cooling fan is working?
This is a very quick video on how to test your engine radiator cooling fan is working and isn’t ceased for any reason. This is done on a Vauxhall Corsa d 2011, this trick should work for other vauxhalls aswell. On older cars mud can get in the fan and cause it to cease.
Can a car run without a radiator fan?
Yes, your car can still run without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to the engine’s performance and lifespan. Every time your engine overheats, you’re causing tremendous damage to the precious engine.
What happens if the motor on the radiator fails?
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.
What causes a radiator fan to stop working?
Voltage spikes, high resistances in control circuits, defective vehicle batteries, bad wiring, short circuits, moisture, corrosion, and even excessive vibration due to damage to the fan itself can all cause a fan motor to fail.
How to diagnose radiator fan problems?
Part 8 of 9: Check if the radiator cooling fan is faulty Locate the radiator cooling fan. Park your vehicle and apply the parking brake. Open the hood and locate the radiator cooling fan. Warm the engine. Start your vehicle and allow the engine to run until it begins to get hot. Check the cooling fan. When the engine starts to get above the normal operating temperature, watch the cooling fan.
Why isn’t the radiator fan working?
The biggest cause of a radiator fan not working is a broken fuse. To see if the fuse is intact and working, you’ll need to look at the fuse panel in your vehicle which will probably be under the hood. The actual location will be listed in your owner manual and will show which fuse works for which component.
Why does your radiator fan keep going on and off?
Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor, PCM or ECU defective. coolant leaks from the water pump, cracked radiator, worn upper or lower radiator hoses, leaky heater core, leaky thermostat housing,
Why does my Jeep not start when it’s warm?
If its a starter issue it WONT crank, when some part of the starter system is failing or failed it wont turn over. Very different from cranking and not starting. If your getting clicking, you may have a weak battery, poor connection or dying starter (likely one of the prior).
Can a bad fan relay cause an engine to overheat?
However, a bad cooling fan relay isn’t the only culprit for excessively high engine temperatures. Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running.
What should I do if my Jeep Cherokee won’t start?
Start your jeep and let it run for 5 minutes. If the problem is a dead battery, then this will charge it. Do not start the car that has the live battery. Disconnect all cables in the opposite order that you connected them.
When does the radiator fan turn on in a jeep?
The radiator fan only turns on once the temperature reaches a certain temperature I believe its about half. But on highway speeds it should run very cool. Your electric fan WILL turn on with your A/C switched on, I was 100% certain it did BEFORE I went out to test it simply so I could say I tested it.
Why is my Jeep Grand Cherokee fan not working?
If the fan comes on you know the fault is before, if the fan doesnt come on you know its after, in that circuit or the fan itself. 2005 Jeep Grand Cherokee – Under the knife getting a complete overhaul. So It ended up being the fan motor.
What to do if your radiator fan is not working?
No the AC will turn the radiator fan on to pull air across the condensor. Your going to need to check for power at the fan, the fan can still be failed and spin just fine by hand, considering you dont have high or low I would lean towards a fan or fan connector concern.
Where does the radiator fan go when its hot?
Having said that Matt, as I already suggested, when its hot out I run right at the middle hash mark, when its cool I run just mm or 2 below, with a known fully functional fan. It has done this for the 1.5 years I have had it, first noticed while I was towing and it freaked me out for a second but it has NEVER gone above the 1/2 hash mark.
What to do if your computer cooling fan won’t run?
Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.
What are the symptoms of a bad cooling fan relay?
1. Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly.
Why is the engine temp light on but not the fan?
That brass nut holds a temp switch into your radiator. The one at your engine block only has to do with the “idiot light” that lets you know you are overheating. The one on the radiator makes your fan switch on. a few replies ago someone mentioned unplugging and defaulting fan on, some years that is true but mine and yours do not work that way.
Why is my electric cooling fan not running?
If the belt/viscous clutch fan is moving enough air (assuming your car has auto transmission), electric fan won’t run. See your “what’s this wire for” thread for an explanation of the coolant temp sensor found in the radiator.
Which is a symptom of a faulty cooling fan?
The most obvious symptom of a faulty cooling fan system is the increase in warm or hot air in your cabin. A broken cooling fan system will affect the motors that run the blower causing them to supply less fresh air into the cabin of the car.
What happens when a car cooling fan goes bad?
Some of these symptoms include: The most obvious symptom of a faulty cooling fan system is the increase in warm or hot air in your cabin. A broken cooling fan system will affect the motors that run the blower causing them to supply less fresh air into the cabin of the car. You will notice that the car will constantly be hot and stuffy as a result.
However, a bad cooling fan relay isn’t the only culprit for excessively high engine temperatures. Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running.
When does the electric cooling fan turn on?
When the electric cooling fan operates is purely a function of the setting of the temperature switch used to control power to the fan. And how long it takes for the engine to reach that temperature at which the fan kicks on is dependent on the ambient air temperature.
Do you have to run radiator fan all the time?
An electric fan SHOULD NOT run all the time. A mechanical fan WILL spin as long as the engine is running, but it will only ‘lock up’ when needed. Furthermore, why does my radiator fan turn on and off? To avoid a further rise of temperature, the fan induces air flow.
When do the fans come on in a car?
That is going to vary. There is no set time. The car’s electric fans or electrically controlled fans will come on when the engine reaches a certain temperature at the thermostat. Clutch type fans will come engage when the air temperature at the clutch gets warm enough to activate the clutch.
Your engine cooling fan, only runs when needed to help cool the engine. So, a engine cooling fan, relay or control circuit failure is bad news. Because, it can allow the engine to overheat. The engine coolant sensor or a separate engine temperature switch, is used to monitor engine temperature.
An electric fan SHOULD NOT run all the time. A mechanical fan WILL spin as long as the engine is running, but it will only ‘lock up’ when needed. Furthermore, why does my radiator fan turn on and off? To avoid a further rise of temperature, the fan induces air flow.
What happens if one fan fails to come on?
If one or both fans fail to come on; the lack of additional cooling provided by the fan may cause poor A/C cooling performance. Also, it may cause the A/C compressor to overheat and fail. The engine may also run hot and overheat, too.
Is the electric motor on a cooling fan replaceable?
The electric motors found on many cooling fans are not much different than regular industrial use electric motors, and are often a serviceable or replaceable component of the cooling fan assembly.
What happens when the relay on a cooling fan fails?
The engine may also run hot and overheat, too. The typical electric cooling fan circuit includes a temperature sensor, a relay, a control module and the fan motor. The relay is the component that fails most often; so be sure to test the relay as well as its power supply and ground connections.
What should I do if my car fan won’t turn on?
On modern vehicles, a bad sensor usually triggers the check engine light. Scan the computer for trouble codes, if necessary. If the fan fails to come on, first check for a fan blown fuse or triggered breaker. On older vehicle models, you may have a fusible link in the circuit.