Free HVAC Tools — No Sign-Up Required

Free HVAC Tools for Homeowners

Not sure what's wrong with your heating or cooling system? Use our free tools to get answers in minutes — before you call, or to confirm it's time to call right now.

Is Your HVAC Situation an Emergency?

Know in under 60 seconds if you need to call right now

Answer 3 quick questions to find out if your heating or cooling problem needs immediate attention or can wait. Free interactive emergency checklist.

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HVAC Symptom Checker

Select symptoms — get a diagnosis in seconds

Select the symptoms your HVAC system is showing and get an instant diagnosis with urgency level and recommended next steps.

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What Sound Is Your HVAC System Making?

Click the sound type — get an instant explanation

Identify strange HVAC noises, understand what they mean, and learn whether your situation needs immediate service or can wait.

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Should You Repair or Replace Your HVAC System?

Get a data-based answer in under 2 minutes

Enter your system age and repair situation to get a data-based recommendation: repair your current HVAC or invest in a replacement.

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What Can These Tools Do for You?

Understand the Problem

Know what's likely wrong before the technician arrives — so you can ask the right questions.

Know When to Act

Our tools give you a clear urgency level — emergency, urgent, schedule soon, or monitor.

Call With Confidence

Connect with a licensed local pro when you're ready — no guesswork, no pressure.

Common HVAC Questions

How do I know if my HVAC problem is an emergency?
Any situation involving a gas or burning smell, complete loss of heat when temperatures are below freezing, or no cooling during a heat wave with elderly or medically vulnerable people in your home is an emergency. Use our Emergency Checklist to get a definitive answer in under 60 seconds.
Should I repair or replace my HVAC system?
The general rule: if your system is over 15 years old and the repair cost exceeds 50% of what a new system costs, replacement usually makes more financial sense. Our Repair-or-Replace Calculator walks you through a full data-based analysis.
What does it mean when my HVAC makes a hissing or grinding noise?
A hissing sound usually indicates a refrigerant leak or air escaping a duct gap. A grinding sound typically means a motor bearing is failing. Both are urgent issues. Use our Noise Identifier for a full breakdown by sound type.
Why is my furnace running but my house isn't heating up?
The most common causes are a dirty air filter blocking airflow, a cracked heat exchanger, a failing blower motor, or a clogged condensate drain. Our Symptom Checker can help you narrow down the likely cause based on what else you're noticing.