Quick answer
Most winter home emergencies — frozen pipes, a furnace that will not start on the first cold night, a water heater struggling to keep up — are preventable with a short list of checks done before the cold weather actually arrives. None of these take long, and most cost little or nothing.
On this page
Plumbing
| Check | Why it matters |
|---|---|
| Insulate exposed pipes in unheated spaces (garage, crawl space, exterior walls) | Prevents freezing, which can lead to burst pipes |
| Disconnect and drain outdoor hoses, shut off exterior spigots | Water left in an outdoor line can freeze and crack the fitting |
| Know where your main water shut-off valve is | See our emergency shut-off guide — critical if a pipe does freeze and burst |
| Check for drafts near pipes running through exterior walls | Cold air infiltration around a pipe run increases freezing risk even with insulation |
Heating system
- Change or clean the furnace filter before the heating season starts — see our filter guide.
- Run the heating system briefly before you actually need it, so any startup issue shows up while it is still convenient to address, not on the first genuinely cold night.
- If you have a fireplace, have the chimney inspected and cleaned if it has not been done recently.
- Bleed radiators if you have a hot-water heating system and any have been cold at the top — see our radiator bleeding guide.
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Exterior and envelope
- Check weatherstripping around doors and windows, and seal any obvious drafts — this directly reduces how hard your heating system has to work.
- Clean gutters before the first freeze, since clogged gutters can lead to ice dams that force water back under roofing.
- Check that door and window seals are not letting in cold air, using a simple hand-check on a windy day.
Appliances and safety devices
- Test smoke and carbon monoxide alarms — heating season is when CO risk rises, given more combustion appliances running for longer.
- Check the water heater is working reliably before demand increases with colder incoming water temperatures.
- If you have a sump pump, test it before winter, since a failure during a winter thaw or ice storm is a common time for basement flooding.
Know your emergency shut-offs
Before anything goes wrong is the right time to confirm you know where your main water shut-off is and how your heating system’s emergency stop works. If a pipe does freeze and split, seconds matter — see our guide on thawing frozen pipes safely for what to do if prevention was not enough.
