The Ruud air conditioner indoor blower runs but the air is not cold; the outdoor unit fan runs but the suction line is not very cold, and the home does not cool.

Safety first: Do not attempt to add refrigerant yourself. Handling refrigerant requires EPA certification and specialized tools.

• Step 1 – Check for obvious airflow issues: Replace dirty filters and ensure indoor and outdoor coils are clean. Poor airflow can mimic low charge symptoms.
• Step 2 – Feel refrigerant lines: With the system running, the larger insulated suction line should feel cold and sweaty; the smaller liquid line should be warm. If both are near ambient temperature, the refrigerant charge may be low.
• Step 3 – Inspect for oil stains: Look around the Ruud condenser service valves, line set connections, and indoor coil for oily residue, which often indicates a leak.
• Step 4 – Shut the system off if icing occurs: If you see ice on the suction line or evaporator coil, turn the system OFF and set the thermostat to FAN ON to thaw. Running while frozen can damage the compressor.
• Step 5 – Call a licensed technician: A technician must locate the leak, repair it, evacuate the system, and recharge it to Ruud’s specified charge (by weight or subcooling).