Question 1

My furnace isn't producing heat but it seems to be running. What could cause that?

Accepted Answer

A furnace that runs but produces no heat is often experiencing an ignition failure — the blower and inducer motor may operate normally while the burner fails to light. Common causes include a cracked or failed hot surface igniter, a contaminated flame sensor that shuts down the gas valve after ignition, a faulty pressure switch preventing the gas valve from opening, or a failed gas valve itself. A technician can quickly narrow down the cause by observing the ignition sequence and reading any fault codes stored in the control board.

Question 2

My boiler is running but there's no heat in part or all of my home. Where do I start?

Accepted Answer

If a boiler is firing but heat is not reaching the living space, the problem is usually in the distribution system rather than the boiler itself. In a hot water system, a failed circulator pump or stuck zone valve is a common culprit. In a steam system, a failed steam trap or improperly venting radiator can block heat delivery. Low system pressure causing the boiler to lock out on its low-water cutoff is another possibility. A technician will check the boiler's operating status, system pressure, and distribution components to isolate the issue.

Question 3

My thermostat is set to heat but nothing is happening at all. Is it the thermostat?

Accepted Answer

A completely unresponsive heating system can be caused by thermostat issues, but it's important to check simpler causes first — a tripped circuit breaker, a switched-off emergency shutoff, a blown fuse on the control board, or a system locked out due to a safety fault. If power is confirmed to the unit and it still won't respond, a wiring fault between the thermostat and the system or a failed thermostat is likely. Newer smart thermostats can also cause no-heat conditions if they are wired incorrectly or if a C-wire is missing.

Question 4

How quickly can you respond to a no-heat call in winter?

Accepted Answer

Response times vary based on current call volume and your location within our service area, but no-heat calls are prioritized — particularly during cold weather. We offer emergency service for situations where the loss of heat poses a risk to occupants or the property. When you call, our team will give you an honest estimated arrival window based on current conditions. We recommend calling as early in the day as possible if you notice a heating issue, even if the home is still warm, so we can schedule service before temperatures drop further.

Question 5

My heat pump isn't heating. Could it be low on refrigerant?

Accepted Answer

A refrigerant undercharge is one possible cause of reduced or absent heating in a heat pump, and it becomes more apparent in colder weather when the system is working harder. However, other causes are equally common: a stuck or failed reversing valve that leaves the system in cooling mode, defrost control issues that cause excessive icing of the outdoor unit, or a low ambient temperature lockout that prevents operation below a certain outdoor temperature. A technician will check system pressures, observe operating mode, and inspect the outdoor unit to identify the specific cause.

Question 6

Should I try to reset my furnace or boiler before calling for service?

Accepted Answer

A single reset attempt is generally reasonable — some lockouts are caused by transient conditions such as a momentary gas pressure fluctuation or a brief power interruption, and the system may restart normally. However, if the system locks out again after one reset, you should stop and call for service. Repeatedly resetting a heating system that is locking out on a safety control can mask the underlying cause and, in some cases — particularly with oil burners — can create a hazardous condition. Note any fault codes displayed before resetting, as they are valuable diagnostic information.

Question 7

My heating system is older. Is it worth repairing, or should I replace it?

Accepted Answer

This depends on the nature of the failure, the age and overall condition of the equipment, and your long-term plans for the property. For equipment under 12–15 years old with a straightforward component failure, repair almost always makes sense. For equipment that is older, has had multiple recent failures, or has a serious issue such as a cracked heat exchanger, the economics often favor replacement — particularly given the improved efficiency of modern equipment. Our technicians will give you an honest assessment and present both options so you can make the decision that's right for your situation.

Question 8

Can you service heating systems in commercial buildings and multi-family properties, not just single-family homes?

Accepted Answer

Yes. Tandem Mechanical services heating systems in commercial buildings, multi-unit residential properties, mixed-use buildings, and light industrial facilities throughout our service area. Commercial and multi-unit properties often involve more complex systems — multiple zones, larger boilers, rooftop units, or building automation system integration — and our technicians have experience working in those environments. We can coordinate with property managers and building staff to access equipment and minimize disruption to occupants.

No Heat Emergency Repair in New Salem, MA

No Heat Emergency Repair in New Salem

No Heat Emergency Repair in New Salem

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