#AskDerekCole Episode 75: Diagnostic and Breakers

28 Jan 2026 · 3 min
Episode

28 Jan 2026 · 3 min

0:00

Derek Cole answers why HVAC companies charge diagnostic fees (they cover a technician, fully stocked vehicle, training, insurance, and travel) and whether you should turn off your unit at the breaker. Use your thermostat instead. Only hit the breaker in emergencies.

Questions this episode answers

June 27, 2019.

To cover the cost of sending a qualified technician in a fully stocked vehicle (inventory/parts ~$6,000 mentioned), their training, insurance, and travel; common across HVAC, electrical, and plumbing trades. Maintenance-club members may be exempt.

No — use the thermostat to turn heating/cooling off. Only use the breaker to kill power in an emergency or if there's a safety hazard; homeowners should avoid working in the electrical panel.

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