It is generally recommended that the radiator fan should turn on when the air conditioner is turned on, to help circulate and dissipate heat. However, if your AC unit is not working properly or you just don’t want it running while sleeping, there’s no need to have the fan turn on automatically.
Should radiator fan run when AC is on or off?
Both radiator fans should always run when the AC compressor is engaged. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F. Click to see full answer. Similarly, is the fan supposed to be on when AC is on?
When should the fan on my air conditioner turn on?
The fan only turns on when cooling or heating (in winter) is required. If you can tolerate most of the summer heat – save for the absolute hottest of days – you'll want to use the AUTO setting. The AC fan kicks in when needed and stops running when the job is done.
How long does it take for a radiator fan to turn on?
Most thermostats open at around 185F and the fan should come on at about 200F. Generally this takes 10 to 15 minutes of idling. The radiator fan is normally controlled by the ECU (electronic control unit) which is the brains of your car.
How hot does a radiator fan need to be to work?
Most fans should come on when the coolant reaches about 200 to 230 degrees. If the fan does not come on, something in the control circuit is defective. Thereof, does radiator fan affect AC? Yes, a broken radiator fan can cause the air conditiong to stop working. The AC system depends upon being able to dissipate heat into the engine coolant.
Does radiator fan always run with AC on?
The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold.Feb 26, 2017
Is the fan supposed to be on when the AC is on?
The fan only runs when the system is on and not continuously. There is better dehumidification in your home during the summer months. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside. If your fan runs continuously, moisture does not have a chance to drip outside.
Will AC work without radiator fan?
Can Ac Work Without Radiator Fan? As soon as the AC compressor kicks on, the room air is replaced by warm fluids on higher tank temperatures or when liquid on the lower tank reaches 212 degrees Fahrenheit. For that reason, the radiator fan is necessary.Mar 3, 2022
Why do my radiator fans only kick on when my AC is on?
The most likely culprits are a thermostatic switch, fan resistor, temperature switch, low-speed or high-speed relay, or a wiring issue. If the vehicle overheats, care should be taken when driving to prevent further damage by overheating.Jun 14, 2016
How can I tell 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.Jul 2, 2021
When should a radiator fan come on?
Most fans should come on when the coolant reaches about 200 to 230 degrees. If the fan does not come on, something in the control circuit is defective. does radiator fan affect AC? Yes, a broken radiator fan can cause the air conditiong to stop working. The AC system depends upon being able to dissipate heat into the engine coolant.
What temperature does a car fan turn on?
Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit).
Should radiator fans turn on when AC is on?
Should radiator fan turn on when AC is on? Both radiator fans should always run when the AC compressor is engaged. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F. Click to see full answer.
Why is a radiator fan unnecessary?
Operating the fan is a decision with many variables, and in a well-designed system it happens when hot outside and not moving, and perhaps after a delay (the radiator doesn't get hot immediately). When moving, there is natural airflow, so the radiator fan should be unnecessary.
What is the difference between a radiator fan and an A/C condenser?
In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside the vehicle can become cold and make you comfortable.
Does an A/C fan need to run?
Well the short answer is yes . The A/C requires the fan to run as part of the heat exchange process. The A/C runs on a separate circuit and is triggered by A/C system. The engine cooling system is normally triggered by the temp control sensor/sending unit or ECM/PCM depending on system, but virtually works under the same premise.
Does an A/C fan have a high or low?
Many single electric fan systems normally have a high and low. A/C on triggers a high fan or hard running engine can do the same. Normally operation with A/C off fan will cycle in low as required by the engine temp spec requirements. Others have 2 fans and one is strictly for A/C. Share.
AUTO
Setting the fan to AUTO means the fan turns on when the system is either heating or cooling automatically. Furthermore, when the set temperature is reached, the system shuts down until the next cycle.
Disadvantages of the AUTO setting
The air distribution is uneven because the fan turns off once the set temperature is reached.
Benefits of ON setting
Hot/cold spots in your room will be reduced due to the even distribution of air.
When the Radiator Fan Should Turn On
The radiator fan is normally controlled by the ECU (electronic control unit) which is the brains of your car. The ECU knows when to turn the fan on by the temperature sensor near the thermostat reading the temperature of the coolant and sends a signal to the fan relay.
Radiator Fan On when the Car is Off
I have mostly worked on cars much older than me and recently was surprised when I heard that I should be careful around cars with electric radiator fans – that they can turn on even when the car is off! After investigating this, I have found it to be true. The radiator fans can indeed turn on even when the car is off.
Why does my radiator fan not come on?
The radiator fan is on a thermal control and turns on when the temperature reaches a set point, it has nothing to do with the AC at all. If your car is at running temperature and the AC fan is not coming on (assuming it is not -20 degrees outside) then there are likely one of a few causes.
Why does my car fan turn on?
The fan turning on is normal and a consequence of the hot coolant, not a cause. While the car is stationary, the fan is supposed to draw enough airflow that the coolant temperature stops rising .
Why is my coolant not moving?
The coolant may not be moving due to a water pump problem, blockage in the radiator or hoses, or a stuck valve, i.e., the “thermostat” in the coolant line. Alternatively, the fluid level may be low. The coolant that remains may be heading back to the engine in less time than designed. Related Answer.
How does an electric cooling fan work?
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.
What does it mean when the AC is off?
If overheating is encountered when the AC is Off, may mean that the temperature sensor that send control signal for ...
How to tell if a car fan is bad?
First check electrical connections and make sure the fan is plugged in and if you have a volt meter that the connector is getting power when the car is on. 1) The fan is frozen up, normally you can check this when the car is off, try turning the fan by hand, if it does not move freely then the fan is likely bad.
What does it mean when a fan comes on?
If you run the checks the fan should come on without any issues. If the fan does come on then it means the temperature sensor is likely bad and that needs to be replaced (sometimes these cannot be replaced without replacing the entire fan).
Do ceiling fans help with cooling?
So, while the ceiling fan won’t exactly help your air conditioner, it can be used in ways that still help you feel cooler and save you money.
Does a ceiling fan increase the potency of an air conditioner?
That’s the short answer, but the whole truth is a little more complicated. Let’s start with the important caveats. The ceiling fan does not increase the potency of your air conditioner. It doesn’t help it cool your home faster, and it doesn’t even help it get to a lower temperature. Ceiling fans actually add heat to your home.
