7 Red Flags in an HVAC Quote (From Someone Who Studies Them)
I analyze HVAC pricing for a living. These are the seven quote patterns that predict overcharges and bad installs, and what a trustworthy quote looks like instead.
Dave Okafor 2 min read
America's HVAC Repair Information Guide
Honest repair costs, step by step troubleshooting, brand reviews, and localized HVAC guidance for all 50 states and more than 3,100 counties. No sales pitch, just the information you need before you call a contractor.
Browse HVAC repair info by state
Every state page covers local climate demands, typical repair costs, seasonal maintenance guidance, and county by county coverage.
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Largest county guides
Most useful guides
- Why Is My AC Blowing Warm Air?The 7 most common reasons an air conditioner blows warm air, which ones you can fix yourself, and when to call a professional.
- AC Not Cooling? Step by Step FixesA systematic homeowner checklist for an air conditioner that will not cool, from thermostat to condenser, with realistic repair costs.
- 10 Signs Your Furnace Needs RepairThe warning signs of a failing furnace, from short cycling to yellow burner flames, ranked by urgency including the signs that mean shut it down now.
- Why Is My Furnace Making Noise?What furnace noises mean, from booms and bangs to squeals and rumbles, which are harmless and which demand immediate shutdown.
- Thermostat Not Working? Fixes That Take 5 MinutesHow to revive a dead or unresponsive thermostat, from batteries and breakers to the float switch trick, and when the problem is not the thermostat at all.
- Heat Pump Not Heating? Causes and FixesWhy heat pumps blow lukewarm air, ice over, or fail in cold snaps, what is normal defrost behavior versus real failure, and repair costs.
Compare brands and systems
- Carrier vs TraneCarrier and Trane are the two most requested premium HVAC brands in America, and for good reason.
- Carrier vs LennoxCarrier and Lennox both compete at the premium end of residential HVAC, but they take different paths.
- Trane vs GoodmanThis is the classic premium versus value matchup.
- Goodman vs RheemGoodman and Rheem battle for the value minded homeowner who still wants a major manufacturer behind the equipment.
- Heat Pump vs FurnaceThe heat pump versus furnace decision shapes your comfort, utility bills, and carbon footprint for the next 15 to 20 years.
- Central AC vs Mini SplitCentral air conditioning cools the whole house through ducts from a single system, while ductless mini splits place individual air handlers in each zone with no ductwork at all.
HVAC brand guides
Latest from the blog
Why Your AC Capacitor Keeps Failing (and What It Really Costs)
Capacitors are the most replaced part in air conditioning. Here is why they fail, why yours might keep failing, and what a fair replacement price looks like.
Mike Reynolds 2 min read
5 Cold Climate Heat Pump Myths That Refuse to Die
Heat pumps stopped being a mild climate technology years ago, but the myths persist. A building science look at what modern cold climate heat pumps actually do.
Sarah Chen 2 min read
HVAC repair questions, answered directly
How much does HVAC repair cost?
Most HVAC repairs cost between $150 and $650, with a national average around $350. Simple electrical parts like capacitors run $150 to $400, refrigerant leak repairs $225 to $1,600, and compressor replacements $1,300 to $2,900. Costs vary by state, season, and system type.
Should I repair or replace my HVAC system?
Use the 5,000 rule: multiply the system's age in years by the repair cost, and if the result exceeds 5,000, replacement usually wins. Systems under 10 years old are typically worth repairing, systems past 15 rarely are, and any R-22 refrigerant system needing sealed system work should be replaced.
How often should HVAC systems be serviced?
Twice a year: a cooling tune up in spring and a heating inspection in fall. Professional maintenance costs $80 to $200 per visit, keeps manufacturer warranties valid, maintains efficiency, and catches the wear parts that otherwise fail during peak season.
What are the most common HVAC problems?
Failed capacitors and contactors lead the list, followed by clogged filters causing frozen coils and short cycling, refrigerant leaks, clogged condensate drains, failed ignitors and flame sensors on furnaces, and thermostat faults. Many present as total failures but cost under $400 to fix.