Emergency

Emergency HVAC Checklist

Quick answer

True HVAC emergencies are gas smells, carbon monoxide alarms, electrical burning odors, no heat below freezing, no cooling above 95 degrees with vulnerable occupants, and active water flooding. Gas and CO mean leave first and call from outside. Everything else starts with breakers, filter, thermostat, and a call describing the emergency plainly.

Is it an emergency? A triage table

Emergency service costs 1.5 to 2 times standard rates, so knowing what truly cannot wait saves both risk and money.

Is it an emergency? A triage table
Situation	Emergency level	Action
Gas smell (rotten eggs)	Life safety	Leave now, call gas utility from outside, no switches or flames
CO alarm sounding	Life safety	Everyone outside, call 911, do not reenter
Electrical burning smell	Urgent	Kill system power at breaker, call same day
No heat, below freezing outside	Urgent	Basic checks, then emergency call; protect pipes
No cooling, 95 plus with elderly, infants, or ill occupants	Urgent	Basic checks, emergency call, cooling center backup plan
Water actively leaking from system	Urgent same day	Kill power, contain water, clear drain if accessible
No cooling, mild weather	Next business day	Standard appointment, save the emergency premium
Strange noise, system still working	Scheduled	Shut down if grinding; otherwise book normally

The first ten minutes

For any non life safety emergency, spend ten minutes on the checks that resolve a third of emergency calls: thermostat mode, batteries, and setpoint; both breakers plus the furnace switch and outdoor disconnect, reset once only; filter condition; float switch and condensate pan; and for furnaces in snow, the exterior intake and exhaust pipes. Photograph or note anything unusual, error codes blinking on the furnace board, ice, water, scorch marks, because that detail gets you triaged accurately and diagnosed faster.

Making the emergency call effectively

Say the safety phrase first: no heat with the outdoor temperature, no cooling with an at risk person in the home, water actively flooding, or burning smell. Companies triage by risk, and vague descriptions get vague scheduling. Ask three questions before authorizing work: the diagnostic or trip fee, whether it applies to repair cost, and the after hours labor rate. Authorize diagnosis, but for repairs beyond roughly $1,500 on aging equipment, it is reasonable to pay for temporary heat or cooling measures and decide repair versus replace in daylight without emergency pricing.

Frequently asked questions

How much does emergency HVAC service cost?

Expect a $150 to $350 after hours diagnostic or trip fee plus labor at 1.5 to 2 times standard rates. A repair that costs $400 on a Tuesday afternoon commonly runs $600 to $800 at midnight. The premium buys immediate response, worthwhile for genuine safety situations and rarely otherwise.

What do I do if my heat goes out at night in winter?

Run the basic checks, then call an emergency line and state no heat plus the outdoor temperature. While waiting: close off unused rooms, gather the household into one room, drip faucets on exterior walls, open sink cabinets, and use space heaters safely, on the floor, three feet from anything combustible, never with extension cords.

Is no air conditioning ever a real emergency?

Yes. Above roughly 95 degrees, homes with infants, elderly occupants, or people with heart, lung, or heat sensitive conditions face genuine medical risk, and cooling loss deserves emergency response plus a backup plan of one cooled room or a public cooling center. Healthy adults in moderate heat can usually wait for standard scheduling.