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It's easy to think of an annual heating tune-up as a quick filter swap and a once-over, but a proper visit covers a lot more ground than that, and most of it is about safety as much as performance. Here's what's actually involved, broken down by what you can do yourself and what a technician checks.
Filter changes are the main homeowner responsibility, and the right interval depends on the filter type: monthly for standard 1-inch fiberglass, roughly every 60 to 90 days for pleated filters, and up to a full season for thicker media filters built into a return. If you have hydronic baseboard heat, bleeding air from each zone at the start of the season, using the small bleed valve at the end of each baseboard run, clears the gurgling and cold spots that trapped air causes. Vacuuming dust from baseboard fins and keeping registers and radiators clear of furniture also belongs on this list.
For gas and oil furnaces, a proper tune-up includes a combustion analysis to confirm the system is burning fuel efficiently and safely, a carbon monoxide test at the heat exchanger and surrounding area, and a visual inspection of the heat exchanger itself for cracks, since a cracked exchanger can allow CO into the supply air. For oil systems specifically, that typically includes cleaning or replacing the nozzle and strainer, checking the burner's ignition, and inspecting the chimney or venting for blockages or deterioration. For boilers, a technician will usually check the low-water cutoff (a safety device that shuts the system down if water level drops too low), test the pressure relief valve, and inspect for any mineral scaling inside the heat exchanger.
A year-round home has someone in it nearly every day to notice a strange smell, an unusual noise, or a thermostat that isn't keeping up. A shore home that's shut for the off-season doesn't have that built-in early warning system. A slowly failing component, a CO problem developing in a flue, or a pilot light issue can sit unnoticed for weeks or months until someone arrives for a weekend and either finds a cold house or, worse, doesn't catch a safety problem at all. This is exactly why scheduling maintenance before closing the house up for the season matters more here than in a typical year-round residence.
A maintained heating system lowers the risk of a CO problem, but a working detector is still the backstop. Detectors should be placed near sleeping areas and on every level of the home, tested monthly, and have batteries replaced on a regular schedule, ideally tied to a date you'll actually remember, like the start and end of daylight saving time.
The houses that have a heating emergency in January are almost never the ones that had a tune-up in October.
Nece's Plumbing & Heating can handle the full annual visit, from combustion safety testing to filter and venting checks, timed to your schedule whether the home is occupied year-round or closing up for the season.