Furnace Cleaning in Houston, TX

What a furnace cleaning actually involves in a Houston attic

Power goes off at the disconnect first. Gas valve to off. The burner door comes off, then the burner assembly slides out as a unit. Ports and crossover tubes get brushed and vacuumed. The flame sensor is scuffed clean, not sanded. Igniter gets inspected, never handled. Heat exchanger surfaces are checked with light and mirror before anything is reassembled.

Then the blower. In Houston the blower wheel is the dirty part, and it got that way in July. The furnace fires a few weeks a year; the same wheel moves cooling air for months. Blades load unevenly and the wheel drifts out of balance. Cleaning it right means pulling the assembly, not spraying into the cabinet.

Attic installs add their own mess. Return-side leaks pull blown insulation and loose fiberglass straight into the cabinet. Eroding duct board liner at the plenum sheds fiber onto the wheel. Rodent nesting shows up in inducer housings and pressure switch tubing.

Afterward the unit runs while temperature rise is checked against the nameplate range stamped inside the door. Flame pattern gets watched at steady state.

If the heat exchanger is compromised, cleaning is the wrong conversation. We say so and stop.