January
Deep winter
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
Forcing a frozen door can damage the opener and seal.
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.