While many of those R-22 systems have been replaced with R-410A units, a large installed base still remains, meaning that technicians will have to know how to troubleshoot and service both types of ...

Air Filter There are several HVAC issues that you can fix yourself. If your system isn’t working as expected, your first order of business should be checking your air filter and replacing it if ...

If you're looking for a more detailed, step-by-step troubleshooting guide, you might want to take a look at my article "Air Conditioning Troubleshooting" in the Service & Maintenance archives of The ...