Here is a suggestion that should end all and any questions. Find (or borrow) a handheld tester which includes an amperage testing option. Mine is an APPA and it will measure amps up to 20 amp (for a max of 30 seconds) but even very cheap multimeters often have a 10 amp setting. Figure out the amperage draw while the motor is running (with the fan on and mounted in the heater or air conditioner...it WILL make a difference). Follow the instructions with the tester for higher amperage measurements. Once you do this you will know for certain how many amps your motor (in operation) is drawing. Resistance wire is interesting. The way it operates is more/less as an accurate resistor. What I mean to say is a specific length of it (say for example 4 feet and 2 inches) will produce a specific resistance amount. Now if you have a "wiper" which makes contact with that wire and completes the circuit, the amount of resistance will be variable and in normal cases will go from "off" to whatever resisted measurement the wiper offers. Resistors limit the amount of current passing through them...current being different from voltage. For decades I've told people to think of voltage as the size of your arm. Think of current as the strength of your arm. Actually you might be able to "see" this happen using the ammeter in your dash. When you turn on the fan motor (engine not running) if the amp draw is higher than 10 amps, you may see the needle deflect to the negative side. It won't be necessarily accurate, but it might tell give you a relative idea. As I said before these motors are funny...especially the ones coming from China. They are not rated and we really don't have any idea how they've been made nor wound until they're tested. Good luck!
