Goodman GMVM970803BN Error Code E2: Low Stage Pressure Switch Stuck Open
What Does Code E2 Mean?
An E2 code on the Goodman GMVM970803BN means the low stage pressure switch did not close after the inducer motor started. When a heating call begins, the control board energizes the inducer motor, which creates negative pressure in the heat exchanger and venting system. This negative pressure is supposed to pull the pressure switch contacts closed, signaling to the control board that combustion gases can safely be vented. If the switch does not close within the expected time, the furnace will not proceed to ignition. The inducer motor continues running as you hear the system running without producing heat.
The most common causes are physical blockages in the venting system. A blocked or restricted flue pipe, a clogged condensate drain that backs water up into the pressure switch hose area, or a cracked and leaking pressure switch hose can all prevent sufficient negative pressure from building up. Bird nests, ice, snow, or debris in the exhaust or intake pipes are common culprits, especially after the furnace has been idle. A weak or failing inducer motor that cannot generate sufficient negative pressure will also trigger this code. Additional causes include the H-fitting atmospheric port being blocked, or the pressure switch set point not matching the furnace specifications.
This code requires a technician to systematically inspect the pressure switch hose for cracks, kinks, or water, verify the flue and intake pipes are clear and properly terminated, check the condensate drain for blockages, and test inducer motor performance.
Common Causes
When to Call a Professional
Contact a licensed HVAC technician if:
- Call a technician to inspect the venting system — blocked intake or exhaust pipes, clogged condensate drains, and cracked pressure switch hoses are the most common causes and require professional clearing or replacement
- If venting is clear, the inducer motor or pressure switch may need replacement — the technician should measure negative pressure at the switch tap to confirm the issue
✓ Verified against manufacturer service manual — March 2026