Immediate action guide
HVAC Technician Emergency Action Steps
What to do right now before a hvac technician arrives, with clear lines for 911, utility, and contractor calls.
First rule
If there is fire, smoke, shock, collapse risk, gas odor, carbon monoxide alarm, injury, trapped people, or any uncertainty about safety, leave the area and call 911. Use these steps only when you can act from a safe position.
E1
No Heat in Winter
Do this now
- Move people, pets, and valuables away from cold rooms, the furnace or air handler, and nearby plumbing.
- Check the thermostat mode, filter access door, and breaker only if everything is dry and reachable.
- Close unused rooms, protect pipes from freezing with normal indoor heat, and avoid fuel-burning temporary heaters indoors.
- Photograph safely, note the time, and save temporary-material receipts.
- Call an HVAC technician and report fuel type, thermostat reading, breaker status, and any alarms.
Do not do this
- - Do not bypass furnace switches, tape safety doors, or run the system with a burning smell.
- - Do not re-enter while alarms, odors, sparks, smoke, water, or movement continue.
E2
No AC in Heat Wave
Do this now
- Move people, pets, and valuables away from overheated rooms, the thermostat, and the indoor and outdoor HVAC units.
- Set the system off for a short period if it is blowing warm air, iced, or making unusual noise.
- Close blinds, use fans only where safe, and move people to the coolest available room.
- Photograph safely, note the time, and save temporary-material receipts.
- Call an HVAC technician and describe whether the outdoor unit runs, the filter condition, and any ice.
Do not do this
- - Do not keep restarting a unit that trips breakers, smells hot, or has ice on the coil.
- - Do not re-enter while alarms, odors, sparks, smoke, water, or movement continue.
E3
CO Detector Alarm
Do this now
- Move people, pets, and valuables away from the entire home, especially rooms with fuel-burning equipment.
- Leave the building immediately and do not stop to find the source.
- From outside, keep doors open only if already open and prevent re-entry.
- Photograph safely, note the time, and save temporary-material receipts.
- Call 911 first, then the gas utility or HVAC contractor only after responders say it is safe.
Do not do this
- - Do not silence the alarm and stay inside to troubleshoot.
- - Do not re-enter while alarms, odors, sparks, smoke, water, or movement continue.
E4
Refrigerant Leak Smell
Do this now
- Move people, pets, and valuables away from the indoor coil, outdoor unit, and rooms with unusual chemical odor.
- Turn the HVAC system off at the thermostat if you can do so without entering a strong odor area.
- Open an exterior door or window only if you can do it without exposure; keep people away.
- Photograph safely, note the time, and save temporary-material receipts.
- Call an HVAC technician; refrigerant handling is not a homeowner repair.
Do not do this
- - Do not cut lines, tighten fittings, add refrigerant, or run the system to test it.
- - Do not re-enter while alarms, odors, sparks, smoke, water, or movement continue.
E5
Blower Will Not Turn Off
Do this now
- Move people, pets, and valuables away from the thermostat, air handler, furnace cabinet, and supply vents.
- Set the thermostat to off; if the blower keeps running and it is safe, switch off the HVAC breaker.
- Keep the equipment area clear and listen for burning smells or unusual vibration.
- Photograph safely, note the time, and save temporary-material receipts.
- Call an HVAC technician and report whether heat, cooling, or fan-only mode was active.
Do not do this
- - Do not remove cabinet panels or defeat the door switch while the blower is energized.
- - Do not re-enter while alarms, odors, sparks, smoke, water, or movement continue.