Goodman two flashes: the pressure switch is closed when it should be open

What Does Error 2 flashes Mean?

Two flashes on a Goodman integrated control reports the pressure switch circuit closed at a point in the sequence where the control expects it open. The control checks the switch before the inducer runs, and a circuit already made at that moment means the switch cannot prove anything about draft once the inducer starts. Applies to: Goodman GMVC-series two-stage variable-speed gas furnaces documented in the installation and operating instructions Take this from the diagnostic table printed in the Goodman GMVC-series installation and operating instructions. Goodman has used other flash counts on earlier and later control platforms, and Amana equipment built on related controls publishes its own table. Take the count from the label inside your own furnace door. Owner-safe checks: Read the flash count through the door sight glass rather than removing the blower door, since opening it can cut control power and clear the code. | Confirm the thermostat is set to heat, is calling, and has good batteries if it uses them. | Look for standing water or staining around the base of the furnace and note anything you find without touching tubing or switches. Qualified technician: Testing a pressure switch, clearing condensate tubing, and inspecting the inducer and vent path are licensed gas-furnace tasks. | Never bridge, jumper, or bypass a pressure switch to make a furnace run. The switch is the only thing confirming that combustion products are leaving the building.

Other Common Goodman furnace — Goodman GMVC-series two-stage variable-speed gas furnaces documented in the installation and operating instructions Error Codes