Mountville Borough sits in West Hempfield Township on the Route 462 and Route 30 corridor between Columbia and Lancaster, which puts it about fifteen minutes by road from the 717 Mechanical LLC shop in Marietta. That proximity matters when your air conditioner dies on a humid afternoon or the furnace will not light on a January morning: the truck that solves the problem is already close, and our goal is same-day service whenever the schedule allows.
As a family owned company serving Lancaster County since 2012, we cover the full mechanical side of a Mountville home: air conditioning, furnaces, heat pumps, boilers, water heaters, and indoor air quality. We diagnose honestly, quote before we work, and offer priority scheduling for urgent repairs in the 17554 area.
Homes here split into two groups. The older borough houses around Froelich Park and along Columbia Avenue were built with radiators, coal or oil heat, and no ductwork, and many still cool with window units. The newer developments on the township side of the borough line went up with central air, gas furnaces, or heat pumps that are now reaching the age where parts start to fail. We work on both every week, which means whatever vintage of equipment lives in your basement or backyard, the technician who shows up has seen it before and knows where that model tends to fail.
Dial (717) 468-9567 and tell us what your system is doing. We will take it from there.
Family Owned & Operated
LOCALLY-OWNED & COMMUNITY FOCUSED
OVER A DECADE OF EXPERIENCE
Heating, cooling, and hot water are three jobs that one good contractor should handle together. 717 Mechanical LLC installs and repairs all three, which means the company that tuned your furnace last fall already knows your house when the water heater needs attention in spring.
Warm air from the vents, ice on the refrigerant lines, an outdoor unit that trips the breaker: each symptom points somewhere specific, and our technicians track the cause down before recommending anything. Schedule AC repair in Mountville and you get a diagnosis and a price, not a sales pitch. The parts that fail most often on the borough's systems are capacitors, contactors, and condenser fan motors, and we keep all three on the truck so a repair rarely needs a second trip. When the fault is a refrigerant leak, we locate it and quote the repair rather than topping off a system that will lose the charge again by August.
Once a compressor fails or repair bills start stacking up, replacement is often the smarter spend. Our AC installation work starts with a load calculation for your specific house, and we install American Standard and AirEase equipment along with ductless mini-splits where ductwork is impractical. For the older houses near Froelich Park that have never had central air, a mini-split is usually the answer: a few quiet wall-mounted heads fed by one outdoor unit, each with its own thermostat, and no plaster torn out to run ducts. For the newer developments with a builder-grade unit at the end of its life, the replacement conversation is about right-sizing and matching the indoor coil so the new system actually delivers its rated efficiency.
Book an air conditioner tune-up each spring and your system enters summer with clean coils, verified refrigerant charge, and tested electrical parts. Tune-ups cost little compared to the mid-July repair they prevent.
Summer in the lower Susquehanna valley is as much about moisture as temperature. An air conditioner that is properly sized and properly charged pulls humidity out of the house as it cools; one that is oversized or low on refrigerant leaves the air cold but damp. If your Mountville home feels sticky even with the thermostat satisfied, that is a solvable problem, and we solve it regularly.
When a furnace short-cycles, blows lukewarm air, or refuses to start, we repair it whatever the brand. When it is time for a new one, our furnace installation covers high-efficiency gas and electric units sized to the home. And every fall, a furnace tune-up checks ignition, gas pressure, and the heat exchanger so winter holds no surprises. West Hempfield Township winters run cold enough that a furnace here logs long hours from November into March, and the January no-heat calls we run almost always trace back to something small: a dirty flame sensor, a failing ignitor, a clogged condensate trap on a high-efficiency unit. A fall visit catches those for a fraction of what a cold-night repair costs, and it keeps the manufacturer's warranty paperwork in order.
A heat pump cools in summer and heats in winter from the same equipment, and modern units handle Pennsylvania cold far better than older generations did. We install ducted heat pumps and ductless mini-split systems, and we repair existing units of any brand.
Plenty of the older homes in Mountville still heat with hot water through cast-iron radiators or baseboard, and we keep those systems running too: gas, oil, and electric boilers, repaired and maintained. Cold radiators on one floor, a pressure gauge that keeps climbing, a relief valve that drips, or a boiler that fires but never satisfies the thermostat all have specific causes, and most are repairable. When a boiler from the 1980s or earlier finally needs more than a part, we install NTI high-efficiency boilers that keep the radiant warmth the house was built around while cutting fuel use.
The hardest question in this trade is when to stop fixing and start replacing. Our rule is simple: we lay out the cost of the repair, the age and condition of the unit, and what a new system would run with financing factored in, then let you decide. Nobody at 717 Mechanical earns a commission for talking a Mountville homeowner into equipment they do not need.
A tank water heater rarely fails politely. If yours is rusting at the base, making popping sounds, or simply not keeping up, we install Bradford White replacements matched to your household's actual hot water demand. We handle the haul-away, the code-required connections, and the expansion tank, so the job is finished properly rather than just swapped. If the tank is younger and the problem is a failed element, thermostat, or thermocouple, our water heater repair team fixes the part instead, and an annual flush keeps Lancaster County's hard-water sediment from cutting the tank's life short.
Navien and NTI tankless units heat water as you use it instead of storing forty gallons around the clock. They suit busy households, tight utility rooms, and anyone planning to stay in their home long enough to benefit from the longer service life.
If allergies flare indoors or dust returns the day after you clean, the HVAC system is usually involved. Every bit of air in the house cycles through the ductwork several times an hour, which makes the air handler the most effective place to clean it. Our indoor air quality solutions can help with:
The heating and cooling problems we see in Mountville sort themselves by address. In the older borough grid around Froelich Park and along Columbia Avenue, the typical call is an aging gas or oil furnace or a boiler on its last decade, ductwork that was squeezed in long after the house was built, and second-floor bedrooms that stay hot all summer. Those homes do best with careful repair, sealed and balanced ducts where they exist, and ductless mini-splits where they never did.
In the newer developments on the West Hempfield Township side, the equipment is usually a builder-grade furnace-and-AC pair or a heat pump that is now fifteen to twenty years old. There the conversation is about a right-sized, higher-efficiency replacement and, until that day comes, twice-a-year maintenance that keeps the current system efficient and the warranty valid. Either way, we start with the house, not the nameplate on the old unit.
The systems that fail least are the ones somebody inspects every year. Our maintenance program schedules those inspections for you: cooling equipment in spring, heating equipment in fall, with reminders so nothing slips. Members also get a documented service history for their equipment, which matters for warranty claims and is worth real money when it is time to sell the house.
Nobody budgets for the furnace to die in February. Our financing options let qualifying Mountville homeowners replace failed equipment now and spread the cost over time instead of draining savings in one hit.
A dead AC in a heat wave or a cold house with kids at home jumps the queue. We provide priority scheduling for urgent repairs throughout Mountville and the Route 30 corridor, and our dispatcher will give you a realistic arrival window when you call.
Call Our TeamAlong with Mountville and the rest of West Hempfield Township, our trucks regularly run to:
If you live between Lancaster and the Susquehanna, you are squarely in our territory.
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.*
Mountville homeowners do not need a contractor from across the county when 717 Mechanical LLC is about fifteen minutes up the road. Since 2012 we have repaired, replaced, and maintained the heating and cooling systems of Lancaster County as a family owned business, and the Route 462 and Route 30 corridor through West Hempfield Township is home turf for our technicians.
From a spring AC tune-up to a complete heat pump installation, from a Navien tankless conversion to Aprilaire humidity control, every job gets the same treatment: a clear diagnosis, a firm price, and work we are willing to put our name on.
Plenty of Mountville customers found us through a neighbor, a coworker, or a relative we had already worked for, and that is how we prefer to grow. A company this close to home cannot afford a bad job in a borough where everyone talks, and we would not want it any other way.
Call (717) 468-9567 for AC repair, heating service, or water heater work in Mountville, PA.
Prefer email? Send us a message and we will follow up with a free estimate.
Contact UsLooking 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.
Schedule Service
© Red Barn Media Group 2026
