Furnace Blower Motor Capacitor Wiring

Remove the wires from the terminal and discharge the capacitor using the instructions included with your furnace.

Furnace blower motor capacitor wiring.

Take pictures of the wiring to reference back if needed. If an hvac motor capacitor has 3 terminals they will be marked f fan h herm compressor c com connects to the contactor to provide power to the. Turn off all power to the furnace. Set a voltmeter to the x1 setting.

Shut off the power to the furnace at the fuse. A start capacitor holds an extra charge to start a motor moving. The capacitor will still hold a charge even without power. Insert and bolt in new capacitor.

The blower motor capacitor mounts to the outside of the blower s housing. What are start run capacitors. Installing a furnace blower motor capacitor is basically the reverse of removing the original one. The speed wires connected to the blower motor are connected to a fan relay which uses a low voltage signal to activate a high voltage switch.

Video demonstrating the standard wiring for the primary blower motor found in most furnaces and air handlers in residential hvac. How to wire a run capacitor to a motor blowers condensers sometimes when a blower or condenser fan motor goes bad a technician or even a diyer has issues wiring the new motor and capacitor most motors come with clear instructions or a wiring diagram on the side. Constant voltage for the blower motor is maintained via a capacitor supplying voltage across its secondary winding. How to wire a furnace or ac blower motor.

Hope this helps a few folks. If an hvac fan motor capacitor just has 2 terminalson its top they will be f fan and c common. Locate the capacitor usual close to the furnace motor. Hvac capacitor wiring number of terminals wiring color codes terminal identification codes.

This video shows how to wire a furnace blower motor to an extension cord how to reverse the rotation what informa. Power on and test the system. Remove the blower housing inside the furnace to access the capacitor. Reattach wires as you have them marked it should not be difficult to relate the new capacitor to the old one and know which wires go where.

However some people still struggle with the wiring part of the motor to the capacitor. Start by carefully inserting the new capacitor into place beside the blower motor. Can a furnace capacitor be tested. Remove any bolt holding the old capacitor in place.