What causes an ECM fan to burn out?
Duct systems with an overly high pressure drop (e.g., more than 1-inch water column static pressure) have been shown to cause ECM motors to burn out and fail prematurely. While a PSC motor will stop pushing if the pressure is too high, an ECM will contine to work harder to push air through, wasting energy and eventually burning out.
How many watts does an ECM fan use?
ECM fans use about 400 watts in cooling mode and about 80 in continuous fan mode ( Michael 2009 ). Because of their variable speed, they can run at low speeds for much of the time while PSC motors are typically on high speed all the time, so annual operating costs for ECMs can be 25% to 75% lower ( Minnesota Power 2015 ).
Why is my radiator fan so loud in my car?
One such problematic issue, the excessively loud radiator cooling fan, is a common plague many automobile owners will experience. Your radiator fan should be audible. Mechanical clutch driven fans are more likely to produce excessive fan noise, usually due to a worn clutch inside the fan assembly.
What should I do if my ECM blower motor does not run?
If the motor runs the problem is in the low voltage thermostat wire. If the motor does not run, remove the 16 pin plug from the IFC board. Locate pins 12 and 15. Connect 24 volts from R to pin 12 and pin 15. Connect pins 1 and 3 to the common side of the 24 volt transformer (fig. 4). The motor should run. ECM Blower Motor Quick Test
What are the signs of a failing ECM?
Common signs of a failing PCM/ECM/ECU include the Check Engine Light coming on, engine performance issues, and the car not starting. 1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting
How can I test if my engine cooling fan is working?
That’s why you will need to test it. Unplug the fan connector closest to the fan. Make up some jumper cables. Then connect them directly, from the battery to the fan motor, to see if it spins. Consequently, if it does not spin it is blown.
How can you tell the pressure of an ECM?
Once you’ve installed the test ports, use a digital or analog manometer with a static pressure tip to measure pressure at each location. High velocities and pressures created by ECMs on systems with dirty evaporator coils can also blow moisture off the coil surfaces into the supply ductwork.
One such problematic issue, the excessively loud radiator cooling fan, is a common plague many automobile owners will experience. Your radiator fan should be audible. Mechanical clutch driven fans are more likely to produce excessive fan noise, usually due to a worn clutch inside the fan assembly.