The best time to schedule maintenance is before you need your system the most. So, if we’re talking about your heating system, schedule service in the fall. Spring is typically the best season for your air conditioner. HVAC professionals will be less likely to be out, busy with emergency calls, during these times, allowing you to schedule maintenance at your leisure.
However, how frequently you schedule your maintenance session is more important than when you schedule it.
A professional should inspect your HVAC systems once a year.
So, if you have a standard central air conditioner or a furnace, each of these units should be serviced once a year.
If you have a heat pump system that you use all year, you should schedule this service every 6 months.