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 ...

Now retired, he is the author of Practical Heating Technology and Practical Cooling Technology, and continues as a co-author of Refrigeration & Air Conditioning Technology, all published by Delmar ...

Before calling in an HVAC tech, try these troubleshooting tips. You may be able to fix the issue yourself and save some money along the way. When your HVAC system stops working, your first ...