Table of Contents
Should cooling fan come on when AC is on?
Both radiator fans should always run when the AC compressor is engaged. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
When should AC fan turn on?
Your HVAC fan should turn on and off with the rest of your heating and cooling system. It’s normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops, but your fan shouldn’t run for hours on its own.
How do I know if my cooling fan is working?
The radiator fan should be running at more RPMs than the motor. If it is not, the fan clutch is bad and needs to be replaced. Some radiator fans are solid mounted, with no fan clutch. If your radiator fan is solid mounted and the fan is not working, your belt is bad and needs to be replaced.
What temperature should fan be on 180 thermostat?
This way with the 180* thermostat, the coolant can drop to 180* and shut the fan off at 185*. You will find that a 180* stat is the most common for these cars. Coolant running at 200* is PERFECTLY acceptable. Newer cars turn the fan on between 212*-215* so 200* is perfect.
Does radiator fan come on with heat?
The engine temperature should trigger the fan to turn on. It will also turn the fan off once the engine has cooled to under 200 degrees. You may have heard of a part called the radiator fan switch or temperature fan switch. This is linked to a thermostat and works much like your home’s HVAC system.
Should both radiator fans be on?
They work separately, unless the car is hot, then they both come on. Does the A/C fan even work? Turn on the A/C to see if it does come on.
How can I test my radiator fan?
Determine whether your radiator fan is manual or electric. To check an electric radiator fan, start the car and let it get up to the temperature where the fan normally kicks on. Use the volt meter to test if there is power to the wires. Normal voltage for a radiator fan is around 12 volts.
What causes cooling fan not to work?
ELECTRIC COOLING FAN PROBLEMS Defective temperature switch, coolant sensor or other sensor. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
What temperature should fan be on 195 thermostat?
The cooling fan temperature defines the upper range. So a 195 degree thermostat and a 235 degree fan switch, in a properly working cooling system, would maintain the engine temperature between 195-235 at ALL times.
Does the coolant temp sensor control the fan?
The sensor works by measuring the temperature that’s being given off by the thermostat and/or the coolant itself. The temperature is then sent to the on-board control system. As the control system receives the temperature from the CTS, it may trigger the cooling fan to either shut off or turn on.
Should fan be on auto or on?
Keeping your fan on AUTO is the most energy-efficient option. 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.