If an AC unit is rarely used but stays on all year long, it still requires periodic maintenance to ensure it functions properly and efficiently when needed. Even if it's not in constant use, dust and debris can accumulate, and components may deteriorate over time. The recommended frequency of servicing depends on several factors, such as the manufacturer's guidelines, local climate, and specific conditions. However, a general guideline for such a scenario would be as follows:
Annual Maintenance: At a minimum, the AC unit should receive a comprehensive maintenance check at least once a year. This maintenance check should be performed by a qualified HVAC technician. They will inspect the unit, clean the coils, check the refrigerant levels, and ensure that all components are in good working condition.
Pre-Season Checkup: Before the cooling season begins (usually in the spring), it's a good idea to schedule a pre-season checkup. This ensures that the AC unit is ready to handle the workload during the warmer months and reduces the risk of unexpected breakdowns.
User Inspection: As a user, you can also perform some basic inspections yourself. Regularly check the air filters and clean or replace them as needed, especially if the AC unit is operating in dusty conditions.
Listen for Unusual Noises: If the AC unit is rarely used, it's essential to pay attention to any unusual noises or changes in performance. If you notice anything out of the ordinary, it's best to have it inspected by a professional promptly.
Remember, regular maintenance not only ensures the AC unit operates efficiently but also helps identify and address potential issues before they become major problems. Neglecting maintenance on an AC unit, even if it's rarely used, can lead to decreased performance, higher energy bills, and potentially costly repairs down the line.