Furnace Repair, Maintenance & Installation Across Calvert County

A furnace is the one appliance in your home that burns fuel and then blows the results past the air your family breathes. That is why combustion and carbon monoxide checks are part of every visit we make, not an add-on. Continental Services covers the full range of gas furnace work in Southern Maryland: furnace repair, annual maintenance, and installation and replacement. As an authorized Ruud Pro Partner with over 40 years in Calvert County, we service all makes and models.

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Our Furnace Services

Three paths, depending on whether your furnace needs attention, upkeep, or replacing.

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Furnace Repair

No heat, short cycling, a burner that will not stay lit, or a system that trips out on its own safeties. We diagnose failed igniters, dirty flame sensors, gas valve faults and control problems rather than guessing at parts.

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Furnace Maintenance

A fall tune-up covers the safety side (heat exchanger inspection, carbon monoxide testing, venting) and the performance side (burner cleaning, flame sensor service, airflow and temperature rise).

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Furnace Installation

Replacing a furnace is the chance to correct whatever the last installation got wrong. We size to the house, verify venting and combustion air, and explain what a given AFUE rating actually buys you.

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Which Furnace Service Do You Need?

Here is how we would think about your situation:

The furnace will not run and the house is cold. Start with furnace repair. Have the thermostat setting and any blinking error code on the control board ready when you call.

A technician found a cracked heat exchanger. That is not a repair situation. A cracked heat exchanger can let carbon monoxide into your living space, and replacement is the safe answer.

It works, but heating season is coming. Book a fall tune-up, or look at our maintenance plans that cover heating and cooling together.

You are weighing gas heat against the alternatives. A heat pump or a geothermal system may suit the house better, and we install all three.

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The Safety Side of Furnace Work

Plenty of furnace calls are really combustion calls. The parts below are what we inspect on every visit, whether you called us for a repair or a tune-up, because a furnace that heats fine can still be venting badly.

Carbon monoxide is odorless and colorless. Testing is the only way to know, so we treat it as part of the job rather than something to upsell.

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Heat Exchanger Integrity

The component that separates combustion gases from the air you breathe. Cracks develop with age and thermal cycling, and a cracked exchanger means replacement rather than repair.

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Ignition & Flame Sensing

Failed igniters and fouled flame sensors are the two most common reasons a furnace tries to start, fails, and locks out. Both are straightforward fixes when diagnosed correctly.

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Gas Valve & Pressure

Incorrect gas pressure wastes fuel and stresses the burner assembly. We verify pressure and combustion rather than assuming the factory setting is still right.

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Venting & Airflow

Blocked venting and restricted return air both cause a furnace to overheat and shut down on its limit switch. Filters are the cheapest maintenance item with the largest effect.

Frequently Asked Questions

Once a year, ideally in early fall before heating season starts. That timing lets us find problems before you actually need heat, and it satisfies the documented professional service requirement carried by most manufacturer warranties. Older systems, or ones that run heavily, sometimes justify a second visit.

Yes. Whether we are there for a repair or a tune-up, we test for carbon monoxide, inspect the heat exchanger, check venting for blockages and verify combustion. Carbon monoxide is odorless and colorless, so testing is the only way to know, and we treat it as part of the job rather than an add-on.

Banging, squealing or rattling noises, heat that comes and goes, frequent on and off cycling, a yellow burner flame where it should be blue, unusual odors, visible rust or soot, or a heating bill that jumped without a change in the weather. Any of these is worth an inspection before it turns into a no-heat call.

It is often worth considering. The two share a blower and the same ductwork, so replacing them together gives you matched equipment, one installation instead of two disruptions, and warranties that run on the same clock. We will look at the condition of both and tell you honestly if waiting on one of them is reasonable.

Family-Owned Service You Can Trust

Our Service Areas
Throughout Southern
Maryland

Continental Services proudly serves seven counties across Southern Maryland, bringing four decades of HVAC and geothermal expertise to both residential and commercial customers. No matter where you're located in our service area, you'll receive the same family-owned commitment to quality, honesty, and exceptional service.

Primary Service Areas:

location_on Prince Frederick

location_on Deale

location_on Leonardtown

location_on California

location_on Dunkirk

location_on Lusby

location_on Chesapeake Beach

location_on Huntingtown

location_on Solomons

location_on Owings

location_on North Beach

Counties We Serve:

Anne Arundel County

Montgomery County

St. Mary's County

Calvert County

Prince George's County

Charles County

Queen Anne's County

We know Southern Maryland - its climate, its communities, and the specific HVAC challenges that homes in this region face. From dealing with high humidity near the Chesapeake Bay to sizing systems properly for the temperature swings between summer and winter, our local expertise ensures you get solutions designed specifically for our area.

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Keep the Heat On and the Air Safe

Whether you are facing a cold house tonight or planning a replacement before next winter, we bring the same safety-first approach to every furnace. Start with furnace repair, maintenance or installation.