What it costs, what's permitted, and what to ask before you hire.
Last verified: 2026-05-31 · Data building
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Cost snapshot
$500–$4,000 — Typical Bay Area repair-cost band for a residential gas furnace or central AC, covering the most common service categories: blower motor or capacitor replacement, ignition control / hot-surface igniter, condenser fan motor, contactor, low-side refrigerant leak repair + R-410A recharge, and routine maintenance. Excludes full equipment replacement (compare with bay-area-cost-heat-pump-hvac), heat-exchanger replacement (commonly $1,500–$3,500 on its own but typically uneconomic vs. replacement on units >10 years old), and refrigerant transitions to A2L (R-454B / R-32) refrigerants on units installed under the 2025 EPA AIM Act phasedown.