Found a mistake, or have a question about something we published? Email us at contact@heatandairhandbook.com.
If you smell gas, don’t write to us: leave the house now, without switching anything on or off or using a phone inside, and call 911 or your gas utility’s emergency line from outside or a neighbour’s home. If a carbon monoxide alarm sounds, get everyone outside and call 911 or the fire department from there.
General information, not professional advice. Your system’s maker, your manual and a qualified technician decide what’s safe for your equipment, and local codes decide what needs a permit or a licensed installer.
We can’t help with your own system
We are not an HVAC contractor, a technician, an equipment maker or a parts seller. We can’t diagnose a furnace or air conditioner, by email or from photos or videos. We can’t read or interpret a code, a blinking light or a thermostat message for you, tell you whether your system is safe to run, say whether a repair is within your skills, or check a quote. We can’t recommend a contractor, a technician, a brand, a model or a part, and we don’t refer anyone to one.
For your own system, start with the label inside the furnace door and the manual for your model; the maker’s own website and support line can help you find them. For anything past the owner checks the manual gives, a qualified technician who can see the equipment is the right person. For a permit or licensing question, ask your building department. Our furnace error code lookup gives the maker’s meaning for the codes we have confirmed, with the maker’s document.
Reporting an error
Please include the address of the page, the rule, date, code meaning, step, figure or sentence you think is wrong, and a link to the regulation, Federal Register notice, agency page or maker document (with its number and edition) that shows the right information, if you have one. We check every report against the source. Federal rules and makers’ manuals change, so a report that a rule has been amended or a manual has a new edition is especially welcome. Our corrections page explains what happens next.
Makers, contractors, advertisers and firms
We don’t sell sponsored posts, links, reviews, listings or placements, and we don’t take affiliate deals, sell leads or make referrals. If you are a maker and a page describes your document or your codes wrongly, or a newer edition has replaced the one we cite, send the document and we will check it like any other report.
What not to send
Please don’t send photos or videos of your equipment, serial numbers, quotes, invoices, your address or other personal details, yours or anyone else’s. We don’t need them to check a page, and we won’t review them. Our privacy policy explains how we handle what you send us.