Heating Repair in Alexandria, VA

Combustion is what makes heating repair different from the rest of home comfort work. A late light-off booms unburned gas inside the heat exchanger and stresses the metal each time it happens. A cracked exchanger can leak combustion gases into the air your family breathes, and a flue that stops drafting pushes carbon monoxide into the living space instead of outdoors. None of these problems announce themselves to someone without training and instruments. Diagnosis has its own traps as well. Short cycling can point to a failing limit switch or to a furnace protecting itself from a clogged filter, and cleaning a fouled flame sensor without asking why simply sets up the next lockout.

That is why Alexandria HVAC does not work on hunches. Our technicians read flame signal on a meter, look at the heat exchanger directly, confirm the flue is drafting, and compare temperature rise to the data plate to make sure the blower speed fits the burner. On heat pumps we check defrost controls, sensors, and the reversing valve before blaming the compressor, and we find out whether the electric backup heat has been running unnoticed and driving up your costs. Nothing is called fixed until it has run a full cycle and proven itself safe and correct, because that is what the machine heating your home deserves.