Furnace indicates blower motor fault; blower fails to start or runs erratically.

Safety first: Turn off power before accessing the blower compartment.

Steps:

• Remove the blower compartment door and locate the CTC circulating blower assembly.
• Inspect the blower wheel for debris or objects that may be jamming rotation.
• For PSC motors, locate and test the blower run capacitor. A bulged or leaking capacitor should be replaced with the same µF rating and voltage.
• Spin the blower wheel by hand; it should rotate freely. If stiff or noisy, the motor bearings may be failing.
• Check wiring connections at the motor and control board for burns or looseness.
• If the motor receives proper voltage but does not run, replace the blower motor with the correct CTC OEM motor (ECM or PSC as equipped).

Note: ECM motor replacement often requires programming or matching to the CTC control board; professional service is advised.