Grandmark Service Company - Fresno's Reliable HVAC Services

Our HVAC maintenance service is designed to keep your system running efficiently and prevent common Fresno-area issues. We perform a comprehensive check that includes cleaning coils, inspecting electrical connections, checking refrigerant levels, and calibrating your thermostat. A key focus is inspecting and clearing the condensate drain line to prevent clogs that are frequent in our climate, which can lead to water damage and system shutdowns. This proactive care helps extend your system's life and improve indoor air quality.

Yes, absolutely. As a full-service contractor, we regularly coordinate roofing and HVAC projects for Fresno residents. This is actually beneficial, as it allows for seamless planning—for instance, ensuring roof penetrations for new HVAC vents are properly sealed and flashed during the roof installation. Handling both under one company simplifies scheduling, communication, and warranty management, providing you with a single point of contact for two major home systems.

This is known as short cycling, and it's a common issue we address for Fresno homeowners. It's often a sign of an oversized unit, a refrigerant leak, or a faulty sensor. Not only does it reduce comfort by creating hot and cold spots, but it also significantly increases wear on components and energy bills. Our technicians are trained to diagnose the root cause, whether it's an electrical issue, airflow restriction, or a need for recalibration, and provide a clear repair plan to restore efficient operation.