Bryant outdoor unit hums but the fan and/or compressor do not start; may start if fan blade is spun by hand.

Safety first: Turn off power at the outdoor disconnect and verify with a non-contact voltage tester. Capacitors store energy; they must be discharged safely.

Steps (for qualified persons only):

• 1. Access capacitor: Remove the service panel on the Bryant condenser and locate the dual run capacitor (usually a metal can labeled C, FAN, HERM).
• 2. Visual inspection: Look for bulging top, oil leakage, or burnt terminals. These indicate failure.
• 3. Discharge capacitor: Using an insulated resistor or appropriate tool, discharge the capacitor. Do not short terminals with a screwdriver; this is unsafe.
• 4. Replace with exact match: Install a capacitor with the same microfarad (µF) ratings and equal or higher voltage rating. Label and reconnect wires to the correct terminals.
• 5. Test operation: Restore power and call for cooling. The fan and compressor should start promptly without humming.

Note: If you are not comfortable working with high-voltage components, have a technician perform this repair.