In Los Angeles, a commercial HVAC service call usually runs $150 to $350 just for the diagnostic visit. At LA Heating and Air our commercial service call fee is $145 and is waived when the repair is approved. That fee covers the technician's time, a full system check, and a written diagnosis, parts and repair labor are billed separately. Most straightforward repairs, such as a capacitor, contactor, or thermostat, come in under $600 all-in. Compressor or control-board work runs several thousand.
Costs climb when the system is on a roof, requires a lift, or the call is after hours. Rooftop package units usually carry a higher trip fee because of access and safety requirements. Emergency after-hours calls are often 1.5x to 2x the standard rate. If your property runs multiple units, a preventative maintenance contract typically waives or heavily discounts the diagnostic fee, which is the main reason most commercial owners put one in place.
