Common questions

Should I set my thermostat fan to on or auto?

Should I set my thermostat fan to on or auto?

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.

When does the engine coolant fan come on and off?

The fan will then cycle on and off as needed, to maintain the proper coolant temperature. So, the fan runs mostly at idle or low speed, when the engine is at normal temperature. Most fans should come on, when the coolant reaches about 200 to 230 degrees.

Why do Japanese cars have a cooling fan?

Most Japanese cars have a normally closed switch. Those switches open when the set temperature is reached, thus turning the fan (s) on. So, cooling fan motors are an important component to any engine cooling fan assembly. And, play a key role in keeping the car at safe temperatures, during idle and low speeds.

Why is the coolant fan switch so important?

Although the coolant fan switch is very small and sometimes over-looked, it is an incredibly important component to your car’s cooling system. Think of this switch as the “gate keeper” to the temperature regulation in your vehicle’s engine.

Why do I need an engine cooling fan?

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. So, extra cooling is not needed, when a cold engine is first started.

The fan will then cycle on and off as needed, to maintain the proper coolant temperature. So, the fan runs mostly at idle or low speed, when the engine is at normal temperature. Most fans should come on, when the coolant reaches about 200 to 230 degrees.

Why are the cooling fans not working on my car?

1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.

How does a radiator fan work when the AC is on?

The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. At higher coolant temperatures, the switch closes to start the cooling fans. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range.

Why do I need to test my engine cooling fan?

So, cooling fan motors are an important component to any engine cooling fan assembly. And, play a key role in keeping the car at safe temperatures, during idle and low speeds. Finally, if you suspect that your cooling fan motors may be having an issue; do some testing to see if you can fix it yourself.

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Ruth Doyle