Preparing for an HVAC service visit takes only a few minutes and can make the conversation more useful. Note any changes in cooling performance, unfamiliar sounds and the rooms where comfort has changed. If the system has had previous work, keep that information available for the technician. Semper Fi Heating & Cooling serves Mesa homeowners with air conditioning repair and hvac contractors services. During a visit, the team can inspect the cooling system, share its findings and discuss potential next steps. Asking questions about the issue and the recommended work can help you understand your options.