Sub Zero Mechanical | Professional HVAC Services in Tempe, AZ

In Tempe's climate, an aging or inefficient system can struggle and drive up energy costs. We recommend considering replacement if your unit is over 10-15 years old, requires frequent and costly repairs, or fails to maintain consistent comfort. During a consultation, we'll assess your system's age, efficiency, and performance to provide a clear, honest recommendation on whether repair or replacement is the most cost-effective solution for your home.

Our maintenance service is designed to keep your system running efficiently and prevent breakdowns. We perform a comprehensive check that includes inspecting electrical connections, testing system controls, cleaning condenser and evaporator coils, checking refrigerant levels, and lubricating moving parts. A key focus for Tempe homes is inspecting and replacing clogged air filters, which are common due to local dust, to ensure proper airflow and system health.

Yes, thermostat calibration problems are a frequent issue we address for Tempe residents. Dust, age, or location (like direct sunlight or a drafty hallway) can cause your thermostat to misread the temperature, leading to an uncomfortable home and higher bills. We can diagnose the issue, which may involve recalibrating your existing thermostat, relocating it for a more accurate reading, or discussing an upgrade to a more precise programmable or smart model for better control and efficiency.