How Does A 2 Speed Radiator Fan Work

If the resistor breaks or has any issues it may cause the fans to only function on certain settings.

How does a 2 speed radiator fan work.

The greater precision of pulse width modulation translates to a small but worthwhile increase in fuel economy. Another symptom of a possible problem with the cooling fan resistor is issues with the cooling fan speed. The cooling fan resistor is meant to send power to the fans in steps so that the fans may operate at. I also show how i tested my cooling fan switches.

When the vehicle reaches a certain speed the blades of the fan will flatten which will provide the engine with more power that it can use. If you find that your vehicle is not cooling off properly the radiator fan might be the culprit. There s a simple reason. The cooling fan relay is the relay that controls the engine s cooling fans.

When the correct parameters are met a temperature switch or. Most cooling fans use electric motors that have a moderate to high current draw and as a result are commonly controlled using relays. Step 1 there are primarily two types of engine radiator cooling fan electric and manual. A manual fan is connected to the engine drive pulleys and is controlled by a thermo fan clutch which senses radiator heat and engages when the engine is running at higher temperatures.

All three relays are ganged together for easy mounting. Mechanical fans can sometimes work better than electric fans. The blades on the flex fan are thin and are made of aluminum or stainless steel. Electric cooling fans have been with us for decades and although staged two and three speed fans are still part of the picture more and more vehicles are being equipped with pulse width modulated fans.

This article pertains to all vehicles. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. For some however electric cooling fans are not only keeping the engine cooler in traffic but they keep the engine cool at stop lights too. The low speed sensor triggers the fan at 180 degrees f while the second sensor engages the high speed side of the fan at 195 degrees f.

Cooling fan speed issues. The switch turns on at 203 degrees fahrenhe.