Goodman air conditioner will not start at all (no fan, no compressor)

Safety first: Be cautious around electrical panels. If you are not comfortable, call a professional.

Steps to check:

• 1. Check breakers: Locate the breakers for the indoor unit (furnace/air handler) and outdoor condenser. Reset any tripped breakers once. If they trip again, do not keep resetting.
• 2. Verify thermostat display: If the thermostat is blank, check for dead batteries (if applicable). If hard-wired, the 24V transformer or fuse may be blown.
• 3. Inspect furnace/air handler door switch: Ensure the blower door is properly closed on Goodman furnaces/air handlers; the door switch must be engaged for operation.
• 4. Check low-voltage fuse: On the indoor control board, look for a small automotive-style fuse (3–5A). If blown, replace with the same rating after inspecting for obvious shorts in thermostat wiring.

When to call a professional: If power and fuses are good but the system remains dead, the control board, transformer, or thermostat may need professional diagnosis.