Before you call for emergency HVAC service, check five things: the thermostat batteries, the breaker, the furnace power switch, the filter, and the oil or gas supply. Two of these fix the problem in roughly half the no-heat calls we run. Here’s how to check each one safely:
1. Thermostat first. Always.
Dead batteries in a thermostat will stop your heat. Swap the batteries, set the mode to HEAT, and push the target temperature 5 degrees above the room reading. If the screen is blank or unresponsive after fresh batteries, the problem may be upstream, keep going down the list.
Smart thermostat? Check if it lost WiFi or power. A reboot solves more than anyone wants to admit.
2. The breaker panel
Find your electrical panel and look for a tripped breaker, it sits between ON and OFF. Flip it fully OFF, then back ON. Furnaces, boilers, and heat pumps all have a breaker, and winter storms can trip them.
If the same breaker trips again within minutes, stop. Repeated tripping means a real electrical fault, and resetting it over and over is how equipment gets damaged. Give us a call.
3. The switch that looks like a light switch
Somewhere near your furnace or boiler, often at the top of the basement stairs or on a nearby joist, there’s a plain toggle switch. It’s the equipment’s power switch, and it gets bumped off by kids, movers, and laundry baskets more often than you’d think. Make sure it’s up.
4. The filter
A clogged filter can overheat a furnace until its safety limit shuts it down. If your filter looks like gray felt, replace it, then give the system 30 minutes. This one is also the cheapest prevention on this list: a $15 filter changed seasonally prevents a surprising share of winter breakdowns.
5. Fuel and pilot
Oil heat: check the tank gauge. In Westport, Rehoboth, and the more rural parts of our area, an empty tank in a cold snap is common, and delivery backlogs make it worse.
Gas heat: confirm the gas valve on the supply line is parallel to the pipe (open), and check whether other gas appliances work. If nothing gas works, it may be a supply issue.
If you smell gas at any point, stop everything, leave the house, and call your gas company from outside. Nothing on this list is worth checking with gas in the air.
When it’s time to call
If the five checks come up empty, the fix likely involves ignitors, sensors, control boards, motors, or refrigerant, things that need a licensed tech and the right parts. Triangle answers 24/7, and our trucks are stocked to fix most no-heat calls in one visit. That first conversation costs nothing, and a real person picks up at 2 AM.
One more thing worth knowing: if your heat fails on the coldest night of the year, so did a hundred other systems nearby. The checklist above is often the difference between fixing it yourself in ten minutes and waiting in the queue.
Frequently Asked Questions
Is it safe to relight a pilot light myself?
On most modern equipment there’s no standing pilot to relight, ignition is electronic. If you have an older system with a pilot and clear manufacturer instructions on the unit, following them is generally safe. If you smell gas, don’t attempt it. Leave and call from outside.
How fast can someone actually get here at night?
We run 24/7 emergency service across southeastern Massachusetts and Rhode Island. Response time depends on the night, but no-heat calls with young kids or elderly residents go to the front of the line.
Why does my furnace start, run a minute, then shut off?
Short cycling usually points to a dirty filter, a failing flame sensor, or an overheating issue. Check the filter first. If it persists, it needs a tech before it becomes a bigger repair.
Should I use my oven for heat while I wait?
No. Ovens aren’t designed for space heating and gas ovens can put carbon monoxide into the house. Space heaters, blankets, and closing off unused rooms are the safe bridge.
No heat right now? Call Triangle Mechanical at (508) 501-7424, day or night. Serving Fall River, New Bedford, Taunton, and communities across MA and RI since 1970.
