Most people wait until their furnace dies in January before calling anyone. That's how you end up overpaying for a band-aid fix. A few smart questions upfront will save you money and headaches.
What to Look For
Licensing and insurance are the bare minimum. Ask for proof and don't take their word for it. Look for a company that has been in business at least five years — that usually means they didn't screw over too many customers. Experience with your specific system matters. A guy who only installs gas furnaces might not know the quirks of a heat pump. Also check if they do both installs and service. Companies that only install tend to skip town when something breaks a year later.
Questions to Ask
Ask how they charge. Flat rate per job? Hourly? Travel fee? Get it in writing before they show up. Ask if they carry common parts on the truck — nothing worse than paying for a diagnosis then waiting a week for a capacitor. Ask about warranties on parts and labor separately. Manufacturer warranty covers the part, not the labor to install it. Ask for references from jobs similar to yours. If they hesitate, that's an answer.
Red Flags
Anyone who pressures you to decide same day is trying to sell you, not fix your problem. Avoid companies that demand payment in full before starting work. A big upfront deposit is a red flag. Watch out for vague estimates like "around two thousand" — get a real number. If they can't explain why a part failed, they're guessing. And if they tell you the whole system needs replacing when a simple repair would do, get a second opinion before writing a check.
How Ratings Help You Choose
Star ratings are useful but only if you read the actual reviews. Look for patterns — do multiple people mention the same problem? Slow response, hidden fees, unfinished work? One bad review from a crazy person is noise. Five bad reviews all saying the same thing is a signal. Also pay attention to how the company responds. Defensive, rude replies tell you more than the original complaint. Ratings help you narrow the list, but they don't replace a phone call.
Compare local hvac companies side by side on RatingsNearMe to see real customer feedback and find the one that fits your situation.