The indoor blower runs, but the outdoor Comfortmaker condenser does not start; warm air comes from the vents.

Safety: Turn off power at the disconnect before opening the condenser panel.

Steps:

• Check breaker and disconnect: Reset a tripped breaker once. Ensure the disconnect is fully inserted.
• Listen for contactor click: With the thermostat calling for cooling, you should hear a click at the outdoor unit. No click suggests a control or contactor coil issue.
• Inspect contactor: Look for burned or pitted contacts. Replace if badly worn.
• Test capacitor: With power off and discharged, test the dual run capacitor (for compressor and fan). Replace if out of tolerance.
• Check safety switches: Some Comfortmaker units have manual reset high-pressure switches; reset if tripped and investigate the cause.

Technician required: If power and controls are good but the compressor does not start, further diagnosis is needed.