Most experts recommend thorough HVAC maintenance at least once a year, with spring being the ideal time to check the air conditioning and fall a perfect time to check the heating system. However, you may need your system checking more often if it’s an older system or you suspect that there’s something wrong. Expect to pay between $150 and several hundred dollars for a check-up, although it’s money well spent and can ensure your system gets you through the summer or winter. And of course, regular maintenance and check-ups of your HVAC system can also mean you don’t have to spend money on a new system any time soon. It’s easy to find an HVAC company near you, but to ensure you’re working with someone reliable, if possible work with a company that’s been recommended to you by other customers.