January
Coldest month
Why it matters
Alarms are your early warning for fire and carbon monoxide, and a dead battery gives no warning.
When to call a pro: Replace any alarm past the date printed on the back.
Why it matters
Cold snaps can split exposed pipes overnight.
Why it matters
New noises are often the first sign of worn rollers, dry hinges or a tired spring.
When to call a pro: Springs and cables are under high tension — leave them to a trained technician.