HVAC Diagnostic Service — Bay Area
A proper HVAC diagnostic is the difference between fixing your system and replacing the wrong part three times. We use calibrated instruments and a systematic process to find the real cause — not the most likely cause — before recommending any repair.
C-20 Licensed HVAC Contractor — CSLB #1155755
Upfront pricing — written quote before any work begins
Same-day service available for urgent calls
Honest repair vs. replace options, no pressure
Serving the Peninsula & Bay Area
What Our HVAC Diagnostic Covers
- Electrical measurement — voltage, amperage, resistance at key components
- Refrigerant pressure and subcooling/superheat analysis
- Combustion analysis for gas heating systems
- Airflow measurement — static pressure, CFM estimation
- Temperature differential testing (delta-T) across coil
- Controls and thermostat communication testing
- Capacitor and contactor condition testing
- Motor winding resistance and insulation testing
- Fault code retrieval for modern communicating systems
- Visual inspection of coils, heat exchanger, ductwork connections
When a Full Diagnostic Matters Most
- System was worked on recently but problem returned
- Multiple companies gave you conflicting diagnoses
- Intermittent problem that only happens sometimes
- You want an independent second opinion before a major repair
- New system not performing as expected
- High energy bills with no obvious comfort issue
What You Get After a Diagnostic
A written report of findings with measured values, identified faults, and a clear explanation of what is causing the problem. Then a repair quote — broken out by option if there are multiple paths forward. You make the decision with full information.
Service Area
San Jose, Santa Clara, Sunnyvale, Mountain View, Palo Alto, Redwood City, San Mateo, Burlingame, Millbrae, San Bruno, South San Francisco, Daly City, San Francisco, and nearby Bay Area cities