Furnace Repair

A furnace almost never fails at a convenient time — it gives out on the coldest morning of the year, after a long weekend, or right when the house is full. When that happens, you don't need a sales pitch; you need a real technician who can find the problem quickly, explain it in plain English, and get your heat back on. That's what Quality Home Heating & Air has done across Southeastern Massachusetts since 1988.

We repair every kind of residential furnace — natural gas, propane, oil, and electric — from high-efficiency condensing units to the older workhorses still heating homes across the South Shore and South Coast. Our trucks are stocked with the parts that fail most often (igniters, flame sensors, capacitors, control boards, blower motors, gas valves), so a large share of repairs are finished in a single visit instead of waiting days for a part.

Just as important, we diagnose the actual cause instead of throwing parts at the symptom. A furnace that short-cycles might need a $30 flame sensor cleaned — or it might have a cracked heat exchanger that makes repair the wrong choice. We'll tell you the difference honestly, give you upfront pricing before any work begins, and never pressure you into a replacement you don't need.

Most no-heat calls trace back to a handful of components. On gas furnaces, a dirty or worn flame sensor is the single most common culprit — it tells the control board the burners actually lit, and when it's coated in residue the furnace lights and then shuts off seconds later (classic short-cycling). Cracked hot-surface igniters, failing inducer or blower motors, bad capacitors, and faulty control boards round out the usual suspects. Oil furnaces add their own list: clogged nozzles, dirty electrodes, fuel filter and pump issues, and ignition-transformer faults.

Airflow problems cause a surprising number of breakdowns, too. A clogged filter starves the furnace of air, which makes the heat exchanger overheat and the high-limit switch shut everything down to protect the system. Left long enough, chronic overheating from neglected filters and blocked vents can shorten the life of expensive components — including the heat exchanger itself.

Finally, deferred maintenance and age catch up with every furnace. Connections loosen, sensors drift, bearings wear, and the small problems that an annual tune-up would have caught turn into a cold house on a January night. Many of the repairs we make are the direct result of a furnace that simply hadn't been serviced in years.