Went to house for Htu on gas furnace. Checked indoor capacitor and ignition control. All within tolerance. Blower and ducts relatively clean. Recommended UV system, customer declined. Replaced filter, airflow good. Went to outdoor and checked amp draw on fan and compressor. Compressor amp high, recommended compressor saver. Fan amp draw good. Outdoor capacitor slightlyout of tolerance, recommended new capacitor, customer wants to wait. Recommended club membership, customer wants more info either email or phone call. System runs smoothly, although noise coming from return vent.