Heating & Cooling
Straight answers on furnaces, air conditioning, heat pumps, and the maintenance that keeps them running, so you know what is normal, what is not, and what a repair should involve.
Your heating and cooling system is usually the single biggest energy user in the house and one of the more expensive things to repair or replace, so it pays to understand how it works before something goes wrong. Whether you have a furnace, a central air conditioner, a heat pump, or some combination, the basics are the same: the system conditions air and moves it through your home, and a few small maintenance habits make an outsized difference in how long it lasts and how much it costs to run.
Most comfort problems trace back to a handful of common causes, and many are simple enough to check yourself, a dirty filter, a thermostat set wrong, a tripped breaker, before you call anyone. The guides below cover the everyday troubleshooting, the routine maintenance that actually matters, how to think about repair versus replacement, and roughly what different jobs tend to cost. For anything involving gas lines, electrical work, or refrigerant, hire a licensed HVAC professional.
Featured HVAC guides
All HVAC guides
What Does an HVAC Contractor Do? A Homeowner's Guide
Learn what HVAC contractors actually do, how to find a qualified one, and when to call for heating, cooling, and ventilation work.
What Is an Air Conditioning Unit? Types, How They Work
Learn what an air conditioning unit is, how different types work, and what to consider before buying one for your home.
Air Conditioner Types and How to Choose One
Learn the main types of air conditioners—window, wall, and portable units—and how to pick the right one for your space and needs.
What Is a Gas Furnace? How It Works & When to Replace
A gas furnace burns natural gas to heat air and distribute it through your home. Learn how they work, efficiency ratings, and when to repair or replace.
Furnace Maintenance: What You Need to Do Each Year
Annual furnace maintenance keeps your heating system running safely and efficiently. Learn what's included, when to schedule it, and how to maintain filters.
What Does HVAC Stand For? A Homeowner's Guide
HVAC stands for Heating, Ventilation, and Air Conditioning. Learn what each part does and why your home needs all three working together.
What Is HVAC? Home Climate Control Explained
HVAC stands for heating, ventilation, and air conditioning. Learn how these three systems work together to keep your home comfortable year-round.
AC Maintenance: What You Should Do Yourself
AC maintenance keeps your unit running efficiently and extends its life. Learn which tasks you can do yourself and when to call a pro.
What Is HVAC? Complete Guide to Home Comfort Systems
HVAC stands for heating, ventilation, and air conditioning. Learn how these systems work together to keep your home comfortable year-round.
Heat Pump Water Heater: How It Works & What to Know
Heat pump water heaters use electricity efficiently to heat water by moving heat instead of generating it. Learn how they work and if one fits your home.
How to Choose an HVAC Contractor: A Homeowner's Guide
Pick the right HVAC contractor by checking licenses, getting references, comparing estimates, and verifying experience. Here's what to look for.
Signs Your Furnace Needs to Be Replaced
Furnaces over 15 years old, frequent repairs, rising bills, and strange noises are clear signs it's time to replace yours. Learn the warning signs.
Central Air Conditioning Cost: What to Expect in 2026
Central AC costs range widely based on system size, efficiency, and whether you're replacing or installing new. Here's what actually affects the price.
How Often to Replace HVAC Air Filter: A Simple Guide
Replace your HVAC air filter every 30-90 days. Learn what affects replacement frequency and why monthly inspections matter for your system.
Heat Pump vs. Furnace: Which System Is Right for Your Home?
Heat pumps move heat efficiently; furnaces burn fuel for warmth. Learn how they work, compare costs and comfort, and decide which fits your climate and budget.
How Much Does a New AC Unit Cost in 2026
New AC unit costs range from $150 to $16,000+ depending on type and installation. Here's what drives the price and what to expect.
Why Is My AC Not Cooling? Common Causes & Fixes
AC not cooling? Learn the most common reasons your air conditioner stops working and which fixes you can try yourself versus when to call a pro.
Furnace Not Turning On? 7 Fixes to Try First
Your furnace won't start? Walk through the most common reasons your furnace isn't turning on and when to call a pro.