Annual furnace maintenance keeps your heating system running safely and efficiently through a Pennsylvania winter. At 717 Mechanical LLC, our furnace tune-up inspects, cleans, and tests the whole system, including the heat exchanger and a carbon monoxide check, so it is ready before the cold sets in and far less likely to fail when you need it.
With over 14 years of experience, our factory-trained technicians service furnaces for homeowners in Marietta, PA and throughout Lancaster County.
Want both seasons handled? Our HVAC maintenance plan pairs this fall visit with a spring AC tune-up. Furnace already broken down? See our furnace repair in Marietta, PA page.
Safety Inspection
Efficient Heating
14+ Years Experience
Our professional furnace maintenance visit gives your furnace a thorough inspection, cleaning, and safety check before the season begins. The full step-by-step process is below.
A tune-up catches most problems early, but call us right away if you notice any of these:
Uneven or weak heating throughout your home.
Short cycling - the furnace turns on and off repeatedly.
Unusual noises like banging, rattling, or squealing.
A yellow burner flame instead of a steady blue one.
Rising heating bills without a change in usage.
If maintenance turns up a worn part, we explain what it is and what it costs before touching it, and when a system is past its prime we offer honest advice on furnace installation & replacement.
Schedule Your Furnace Tune-UpEvery furnace maintenance visit follows the same checklist, whether the system is a two-year-old American Standard or a furnace that has been heating a Marietta farmhouse for fifteen winters. Here is what we do, in order:
You get a plain-language summary of what we found, what we adjusted, and anything worth watching before next season.
A gas furnace is safe when it burns cleanly and vents properly, and an annual inspection is how you confirm both. The heat exchanger is the metal wall that keeps combustion gases separate from the air that moves through your home. Thousands of heating and cooling cycles can eventually crack it, and a cracked heat exchanger can let carbon monoxide into your supply air. Carbon monoxide has no color and no smell, so you will not notice it without a detector or a technician's meter.
Our inspection checklist covers the heat exchanger surfaces, the burner flame, the flue and venting, and a carbon monoxide reading at the furnace. If we find a crack or a venting problem, we shut the system down, show you what we found, and walk through your options. Many furnaces in Lancaster County's older housing stock are well past ten years old, which is exactly when these problems begin to show up. Pair your yearly inspection with working CO detectors on every floor of the house.
Once a year, ideally in early fall before the first cold snap.
In Marietta and the rest of Lancaster County the first real cold usually arrives in late October or November, and the phone rings hardest on the first freezing night. Booking furnace maintenance in September or early October means you get a convenient appointment, any worn part is replaced before it fails, and the system has been safety-checked before it runs for hours at a stretch. It is also the easiest time to sort out a filter supply for the season and to test the thermostat schedule before you rely on it.
Missed fall? A mid-winter visit is still worth doing. A furnace that has already been running for weeks benefits from a filter change, a burner cleaning, and a fresh carbon monoxide check. Spring is the time for the cooling side of the house, which is why our maintenance plan pairs the fall furnace visit with a spring AC tune-up and adds priority scheduling and repair discounts for members.
For the longer answer on how often a furnace should be serviced, including the filter, vent, and thermostat checks you can handle yourself between visits, see our guide.
Preventative maintenance is one of the best ways to avoid costly repairs and keep your HVAC system running efficiently. Our maintenance plans include:
We believe every homeowner deserves access to reliable heating and cooling solutions, which is why we offer flexible financing options through companies we trust. Whether you need a new installation or a repair, you'll find a plan that fits your needs.
Learn MoreAs a family-focused HVAC company, our mission is to provide honest service with a personal touch. We treat every home as if it were our own, ensuring high-quality workmanship and lasting results.
As a family-focused HVAC company, our mission is to provide honest service with a personal touch. We treat every home as if it were our own, ensuring high-quality workmanship and lasting results.
Enjoy 10% off your next repair call with us.
Take $500 off the installation of a new unit.*
Furnace trouble rarely stops at one job. See the full picture on our furnace services page, or jump straight to what you need:
Furnace Installation & Replacement - Right-sized Armstrong Air, AirEase, and American Standard furnaces installed with honest guidance on efficiency ratings and financing.
Furnace Repair - No heat, short cycling, strange noises, or rising bills: we diagnose the real problem and fix it.
All Furnace ServicesLooking for reliable HVAC services near Marietta, PA? We proudly serve Marietta and nearby communities, delivering expert heating, cooling, and indoor air quality services. Whether you’re in Columbia, Mount Joy, or Elizabethtown, our team ensures top-quality workmanship and fast, dependable service. Contact us today for all your home comfort needs!
In addition to serving Marietta, PA, we provide HVAC services to the surrounding Lancaster County communities and beyond, including but not limited to:
No matter where you’re located in these areas, you can count on us for prompt, reliable service.
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