The Minnesota Department of Labor and Industry states that the state does not require a mechanical-contractor license, but a business must file the required mechanical-contractor bond to contract for heating, ventilation, cooling, air-conditioning, fuel-burning, or refrigeration work. DLI also notes that local licensing requirements can apply.
The City of Minneapolis states that most heating, air-conditioning, ventilation, refrigeration, and gas-piping work requires a mechanical permit. Its page connects contractors with permit applications, fees, inspections, and city-licensed mechanical and heating contractor information. The business should verify the current requirement for each address and scope.
An HVAC service operation needs to distinguish an urgent loss-of-heat or cooling call, planned maintenance, quoted replacement, permit-dependent work, and a return visit. Software should preserve that context and the customer history. It should not claim to determine code compliance, equipment sizing, refrigerant rules, or permit eligibility.