What to do if…
your heating system stops working and your home is getting cold
Short answer
Move everyone into the warmest safe room, add dry layers, and rule out carbon monoxide danger before trying to troubleshoot. Then contact repair help and make a warm-place plan early, especially for children, older adults, or anyone with health risks.
Do not do these things
- Do not heat your home with a charcoal grill, camp stove, generator, gas oven, or gas stovetop; this can cause carbon monoxide poisoning or fire.
- Do not run a space heater while sleeping or leave it unattended.
- Do not plug a space heater into an extension cord or power strip.
- Do not place a space heater near bedding, curtains, clothing, paper, or furniture; keep it at least 3 feet from anything that can burn.
- Do not attempt DIY work on gas lines, burners, vents, or internal furnace components.
- Do not ignore flu-like symptoms such as headache, dizziness, weakness, nausea, vomiting, chest pain, or confusion, especially if more than one person feels sick indoors.
- Do not stay inside to investigate if a carbon monoxide alarm sounds, you smell gas, see smoke, see sparking, or feel unsafe.
What to do now
- Move to the warmest safe room: choose one room, shut doors, close curtains, block drafts with towels, and keep people off cold floors with shoes, slippers, rugs, cardboard, or blankets.
- Check for carbon monoxide danger first: if a carbon monoxide alarm sounds, anyone has possible carbon monoxide symptoms, or symptoms improve outside, get everyone to fresh air immediately. Call 911 or the fire department from outside and do not go back in until responders say it is safe.
- Get poisoning guidance after you are away from danger: if you are in fresh air and need advice about possible carbon monoxide exposure, call Poison Control at 1-800-222-1222. Call 911 instead for severe symptoms or immediate danger.
- Leave first if there may be gas, fire, or unsafe electrical conditions: if you smell gas, see smoke, see sparking, or there is water around electrical equipment, get everyone out. From outside, call 911 or your utility emergency line.
- Do only safe, simple checks: if there is no carbon monoxide alarm, gas smell, smoke, sparking, or unsafe electrical condition, check that the thermostat is set to heat and has working power or batteries; check whether a furnace breaker has tripped; and check whether the furnace service switch is on.
- Call the right repair route: if you own the home and there is no immediate danger, call an HVAC repair service. If you rent, notify your landlord or property manager immediately by phone and in writing, saying: “No heat; indoor temperature dropping quickly; urgent repair needed.”
- Document the rental problem without delaying safety: take timestamped photos of the thermostat display and a separate thermometer reading if you have one. Keep copies of texts, emails, work orders, and missed repair updates.
- Watch for cold injury: shivering, exhaustion, unusual sleepiness, confusion, fumbling hands, memory problems, or slurred speech can be warning signs. In babies, watch for very low energy or cold, bright red skin. Move to a reliably warm place and seek medical care if you are worried.
- Use safe short-term warmth: wear dry layers, socks, and hats; wrap up in blankets; drink something warm if you can swallow safely; and eat something if available. Use an electric space heater only on a flat surface, plugged directly into a wall outlet, at least 3 feet from anything that can burn, and turn it off when leaving the room or sleeping.
- Reduce burst-pipe risk if it is very cold: open cabinet doors under sinks so warmer air can reach pipes. If pipes are on exterior walls and freezing is likely, letting a cold-water faucet drip may help keep water moving.
- Make a warm-place plan early: if repair is not imminent and the indoor temperature is still dropping, arrange to stay with friends or family, go to a warming center, or use a hotel or shelter if you can do so safely. Call 211 to ask about local warming centers, shelters, emergency utility help, and energy assistance such as LIHEAP where available.
What can wait
- You do not need to diagnose the furnace failure tonight.
- You do not need to decide whether to replace the heating system right now.
- You do not need to start a legal dispute immediately; document, notify, and focus first on warmth and safety.
- You do not need to solve every pipe, thermostat, utility, and landlord issue at once.
Important reassurance
A home getting colder quickly can make it hard to think clearly. Your immediate job is simpler: avoid carbon monoxide and fire hazards, keep people warm, contact repair help, and get to a warmer place if the home is not staying safe.
Scope note
These are first steps for the next few hours. Local tenant rules, housing codes, repair timelines, utility procedures, and assistance programs vary by state, city, provider, and household situation, so later decisions may need local specialist help.
Important note
This is general information, not medical, legal, financial, engineering, or professional advice. If carbon monoxide exposure, fire, gas leak, severe cold injury, or another immediate danger is possible, move to safety and use emergency services. For local warming centers or emergency energy assistance, 211 can be a good starting point.
Additional Resources
- U.S. Consumer Product Safety Commission — There’s a Chill in the Air – Stay Warm Safely – Be Cautious When Using Generators, Furnaces and Space Heaters
- Carbon Monoxide Poisoning — Carbon Monoxide Poisoning Basics
- Winter Weather — Preventing Hypothermia
- Poison Control — Get Poison Control help online now.
- 211 — Your Local 211
- American Red Cross — Preventing & Thawing Frozen Pipes
- Acf — JavaScript is disabled
About this guide
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