AC Maintenance in San Marino, CA

Maintaining Multi-System Homes

San Marino's housing is larger and older than almost anywhere else we serve — substantial 1920s and 1930s residences on generous lots, many with cooling that was added in stages over the decades. The practical result is that a single property often runs multiple independent systems of different ages, sometimes from different manufacturers, each serving a portion of the house.

That makes maintenance a more involved job than it looks. A property with three systems has three sets of coils, three refrigerant charges and three sets of electrical components, and the oldest of them is usually the one that fails. We document each system separately so you know what condition every piece of equipment is actually in rather than getting one summary for the whole house.

What a Maintenance Visit Covers

Each system on the property gets the same full check:

• Refrigerant Charge: Measured against manufacturer specification on every system, not just the accessible one.
• Coil Cleaning: Condenser and evaporator coils cleaned so each system can reject heat properly.
• Electrical Testing: Capacitors, contactors and connections tested under load and retightened.
• Airflow Measurement: Static pressure and temperature split checked per system.
• Zone Controls: Dampers and zone boards tested where the property is zoned.
• Condensate Systems: Every drain line cleared and each pan and float switch inspected.