Furnace Repair in Great Falls, VA
When a furnace in Great Falls won't stay lit or won't start at all, the cause is usually a sensor, an igniter, a pressure switch or a control board, not the whole furnace. Reliable HVAC McLean serves Great Falls, Great Falls Village and Forestville. We answer 24/7, including nights and weekends.
What usually goes wrong
- Burners light and shut off within minutes
- Blower runs but the air is cool
- Furnace cycling on and off all day
- Error code flashing on the control board
- Loud rumble or squeal at startup
How we handle furnace repair
We test the ignition sequence step by step, clean or replace the flame sensor if needed, check the pressure switch and inducer, and finish with a combustion and carbon monoxide check.
About Great Falls homes
Homes in Great Falls are mostly large single-family homes on wooded lots, many built from the 1970s through the 2000s. A lot of Great Falls homes have well water, long driveways and big footprints, and many still heat with propane or oil furnaces or heat pumps with backup strips because natural gas doesn't reach every street. Those details shape how we approach furnace repair in Great Falls: what equipment we expect to find, where it sits and how the ductwork is likely laid out.
Cost and timing
Flame sensors, igniters and pressure switches are common, affordable fixes that we usually finish on the first visit. Control boards and inducer motors cost more. On a furnace past 15 to 20 years, we'll compare the repair against replacement so you can make the call.
Questions we hear
Is a burning smell from the furnace normal?
A dusty smell for the first few minutes of the season is normal. A strong burning smell, or any gas smell, is not. Turn it off and call.
How do I know if my furnace is too old to repair?
Age, repair history and the cost of the part all matter. We'll give you an honest repair-or-replace recommendation instead of pushing one or the other.
Do you work throughout Great Falls?
Yes, from Great Falls Village to Seneca and the streets off Georgetown Pike, Walker Road and Route 7.
More in Great Falls:
AC Repair Heat Pump Repair & Service 24/7 Emergency HVAC Repair HVAC Tune-Up & Maintenance Ductless Mini-Split Installation Thermostat Installation Air Duct Cleaning All services in Great Falls
Nearby: Furnace Repair in Tysons Furnace Repair in Wolf Trap Furnace Repair in Reston