When does the VCM turn off the auxiliary cooling fan?
When does the VCM turn off the auxiliary cooling fan?
If the auxiliary cooling fan has been turned ON by high A/C head pressure, the VCM will turn the fan OFF when the pressure has dropped to 250 psi. The minimum ON time for the auxiliary cooling fan is 30 seconds. I’m not seeing the pictures in your post.
How big of a cooling fan do I need for an 8 cylinder car?
A general guideline to follow for cooling a stock engine is 2,500 cfm for an 8-cylinder, 2,000 cfm for a 6-cylinder, and 1,250 cfm for a 4-cylinder. Of course, high-performance engines require more airflow. Many electric cooling fans are rated by recommended horsepower to help you choose the optimum cooling fan for your vehicle.
Can a pusher fan be used as an auxiliary cooling source?
A pusher-style fan can be used as an auxiliary cooling source, but you should sure make the fan covers as much of the radiator core as possible.
How to choose the best radiator cooling fan?
How to Choose an Electric Radiator Fan. Cooling fans are categorized by cubic feet per minute (cfm) ratings. A general guideline to follow for cooling a stock engine is 2,500 cfm for an 8-cylinder, 2,000 cfm for a 6-cylinder, and 1,250 cfm for a 4-cylinder. Of course, high-performance engines require more airflow.
Can a flex a Lite fan be used as an auxiliary fan?
In some applications, this can cause the engine to run hot or overheat because there isn’t enough air moving through the radiator. Adding an auxiliary electric fan to the front of the radiator can overcome this problem. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use.
When do you need an auxiliary electric fan?
We’ve seen an auxiliary electric fan help many types of vehicles keep their cool. This includes off-road vehicles that are moving slow on a trail, hot rods at big events where there is a lot of traffic, tow vehicles carrying a heavy load up a steep grade and commercial delivery vehicles…
When does the AC condenser fan turn off?
The auxiliary cooling fan is controlled by the VCM. The VCM controls the ground path for the cooling fan relay. ECT above 107°C (225°F) . A/C head pressure above 300 psi. Once the auxiliary cooling fan has been turned ON by the Engine Coolant Temperature (ECT) sensor, the VCM will turn the fan OFF when that temperature has dropped about 4°C (7°F) .
