i have an older furnace and i need to change out the blower motor soon the original motor is getting bad. bushing bad. anyway i got another motor the same frame size but it came with 4 wires. white black red yellow or orange i can't tell. i did an ohm on them and i got w to black 2.0 w to yellow 3.2 w to rwd 3.9 but then from red to yellow 1.0 red to black 2.4 black to yellow 1.8 so they are connected inside also to have ohm's thru them.
i'm guessing the white is neutral and then i connect black,red,yellow for the speed. the motor has 1050 950 650 for speeds. and i'm thinking i need the 950 or 650 for the heat. i do not have a/c so any ideas the motor is a westinghouse 1/6 hp s# 310p631. thanks for any help on this bp.
Best Answer
Red is normally low, yellow medium and black is high. There is normally a wiring diagram on the motor. Your old motor should have the RPM’s listed , but normally high is for AC . Make sure to wire nut the 2 unused wires. And yes white is the neutral.