$69 flat diagnostic — waived in full when you approve the repair · HVAC & appliance repair
Maryland & Virginia (571) 478-1797
Heating & Furnace Repair
Swift Tech LLC repairs gas furnaces, electric furnaces, heat pumps and boilers across Maryland and Virginia. No-heat calls are prioritized ahead of all other work, on the same $69 flat diagnostic that is waived when you approve the repair.
$69 flat diagnostic — waived in full if you approve the repair.
A house with no heat in February is not a scheduling problem, it is a burst-pipe risk. No-heat calls go to the front of the queue ahead of everything else on the board, and the arrival window for your area is quoted before you commit rather than after.
Heating faults split cleanly into three families — combustion, air movement, and controls — and they are diagnosed differently. A furnace that ignites and then shuts down after ninety seconds is telling you something specific, and it is not the same thing as one that never ignites at all.
What it is doing
Check the obvious first: thermostat batteries, the furnace switch on the wall beside it that looks like a light switch, and the breaker. Past that it is an ignition fault, a failed inducer or pressure switch, a tripped limit, or a gas supply issue. All of them are diagnosable in one visit.
Short cycling on a call for heat usually means the system is tripping its own safety. A dirty flame sensor is the most common single cause and one of the cheapest to fix. A blocked flue, a failing pressure switch, or a high-limit trip from restricted airflow all present the same way from the hallway, which is why it gets tested rather than guessed.
If the blower runs but the air is cold, the burners are not staying lit or the system is in a post-shutdown cool-down. On a heat pump, cold air during a defrost cycle is normal and brief; cold air continuously is not, and usually means the system has lost charge or the reversing valve is not shifting.
Heat pumps lose capacity as the outdoor temperature drops and lean on auxiliary heat strips to make up the difference. A system running on aux heat far more than it should shows up first on the electric bill. It is worth diagnosing early — the fault is often a defrost control or a charge problem, and running on resistance heat all winter is the expensive way to find out.
A dusty smell on the first burn of the season is normal and passes within an hour. A sharp chemical or burning-plastic smell is not, and a smell of gas means leave the house and call the gas utility before calling anyone else.
A cracked heat exchanger vents combustion products into the air the house breathes, and it is not visible from the front of the furnace. Every heating visit includes combustion and CO testing as standard rather than as an upsell, because it is the one furnace fault where the consequence of missing it is not a cold house.
Housing stock across Frederick County, Montgomery County and Fairfax County spans about a century of construction, and the heating equipment reflects it.
A furnace with a confirmed cracked heat exchanger needs replacing and there is no arguing with it. A twelve-year-old unit with a failed inducer motor usually does not. Swift Tech gives the repair number and the replacement number together and says which one it would choose in your position — and will tell you when a repair beats a new system, which is the opposite of what a commissioned salesperson is paid to say.
Asked and answered
Short answers. If yours is not here, call and ask — the phone is answered by someone who does this work.
Every area carries a written arrival window, quoted before you book. HVAC or appliance, it is the same phone call.
$69 flat diagnostic · waived on approved repair