Question: I have a question about my air conditioner. The air handler in the attic gets a lot of mildew on the outside of the unit and around the ductwork. Mildew builds up in the drain pan and then ...

In this troubleshooting situation a technician has responded to a complaint of “not cooling” on a six-year-old R-410A split system that employs an upflow gas furnace indoor air handler and a ...

Like any appliance, air conditioners need a little TLC to deliver optimal performance. ACs that haven’t been kept in top-notch condition tend to struggle most. We asked air conditioner pros and ...

In this troubleshooting situation, you are responding to a customer’s complaint about their heat pump, and you’re not the first technician called in to service this equipment. The customer’s ...