Trusted HVAC Repair in the Inland Empire

An air conditioner running but not cooling usually points to restricted airflow or a heat‑transfer or control issue inside the system. Most often the root cause is routine buildup or a setting that prevents the system from shedding heat. It can also stem from a refrigerant leak, a wiring or thermostat fault, or a worn component that won’t engage under load. We frequently see this during heat waves in the Riverside area when outdoor coils get dirty fast. If you prefer a pro diagnosis, Magnolia offers a $99 evaluation that’s waived when you approve the repair.

Check these quick signals before you call:

• Replace a dirty filter, set the thermostat to Cool/Auto, open supply vents, clear 2–3 feet around the outdoor unit, and confirm breakers.
• Frost on copper lines or the air handler means a freeze; keep the system off to thaw.
• Outdoor fan runs but the unit hums or clicks without steady operation, or it short-cycles under a minute.
• Weak airflow in many rooms and a rising bill can indicate duct or blower issues.

Turn the system off if you see ice or hear repeated clicking to prevent compressor damage. <br/> Updated: 2026-06-06 <br/> Need help in Riverside, CA? Call (951) 688-3524 or book online.