Guides

Safe checks for a furnace that will not heat or an AC that will not cool, and what to do when a carbon monoxide alarm goes off.

• AC not cooling: safe checks and how to stay coolSimple checks for an air conditioner that stopped cooling, and how to stay safe in the heat.
• Carbon monoxide alarm going off: what to do nowGet out, call 911, and do not go back in until responders say it is safe. Then find the source.
• Furnace not working: safe checks to try firstSimple checks for a furnace that will not heat, plus how to stay warm safely while you wait.