The answer to 'how long does emergency HVAC service last' is that emergency HVAC service typically lasts until the immediate problem is resolved, which can range from a few hours to a full day depending on the issue. Emergency HVAC technicians will work quickly to diagnose and repair any urgent problems, such as a complete system failure, refrigerant leak, or other critical issue that requires immediate attention.
Once the emergency repairs are completed, the technician will advise the homeowner on any additional maintenance or repairs that may be needed to restore the HVAC system to full functionality. In some cases, temporary fixes may be required until more extensive work can be scheduled, but the goal of emergency service is to restore comfort and safety as soon as possible.