Runtime from April to October, a condenser sitting in full sun, and ductwork in a 130 degree attic. Why equipment ages faster here.

Multiply the age of the unit by the repair quote. If the answer clears five thousand dollars, you are paying to fix the wrong problem.

A licence number, a written quote, and who actually answers the phone at nine at night. The checks that separate a contractor from a call centre.

Most of the breakdowns we get called out for were avoidable. Here is what to check each season, and what to leave to a technician.

Worth real money when your ducts are genuinely dirty. Worth nothing when they are not. Here is how to tell which one you have.

Almost every expensive failure gives warning first. These are the five warnings homeowners tend to live with until August.