Which equipment component needs attention?
Furnace and air-conditioning cleaning can involve different components, so first identify the equipment and the concern. If a blower assembly is visibly loaded, ask whether removal and blade-by-blade cleaning are included; if cooling performance is the concern, ask whether the evaporator coil can be inspected and washed in place. Heat exchanger surfaces and nearby controls require careful scope clarification. Compare proposals by component, access and protection steps rather than treating all equipment cleaning as the same task.
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