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Heating or cooling acting up? Tell us what it's doing.
Describe the problem in your own words and we'll show you the guides that explain what a professional looks for — so you understand what's going on before you call one.
When to call a pro
These guides explain how it's diagnosed. The repair itself usually needs a licensed tech.
Refrigerant, gas, and high-voltage electrical work require a licensed HVAC technician — for your safety, to stay within code, and to keep your equipment warranty valid. Use the guides above to understand the problem, then get it fixed right.
Browse the free HVAC Academy →Want the full course? The free HVAC Academy organizes all 278 guides into six classes.
Educational only — not a diagnosis or repair instruction. For gas, electrical, or refrigerant work, always call a licensed HVAC pro.