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Goodman · Furnace

EE2 Pressure switch did not close (inducer runs, no ignition)

Medium severity Goodman/Amana GM9S96/AM9S96Goodman/Amana GM9S80/AM9S80Goodman/Amana GM9C96/AM9C96

What the control is telling you

The inducer is running but the (low-stage) pressure switch circuit never closes, so the furnace will not light. Flowcharts call this code E2.

Applies to: Goodman/Amana/GMC gas furnaces, 9-speed ECM, 7-segment control. Two-stage 96%: AC9C96, AM9C96, GC9C96, GM9C96. Single stage 80%: VC9S80, VM9S80, AC9S80, AM9S80, GC9S80, GM9S80. Single stage 92/96%: VC9S96, VM9S96, AC9S96, AM9S96, AM9S92, GC9S96, GM9S96, GM9S92

Likely causes

  • Pressure switch hose blocked, pinched, holding water or connected to the wrong port
  • Blocked flue or intake pipe, or vent too long / too many elbows / wrong termination
  • Blocked condensate drain system (90% models)
  • Weak inducer (low voltage, failing motor)
  • Wrong pressure switch set point or bad switch contacts
  • Loose or miswired connection in the pressure switch circuit

Test and repair steps

  1. Confirm the inducer actually runs during the call for heat (115 VAC at the inducer during trial for ignition); fix loose inducer wiring.
  2. Inspect the pressure switch hose for kinks, water or a wrong connection; repair or replace it.
  3. Check the flue and intake piping for blockage (nests, ice, debris) and confirm length, elbows and termination are within the installation limits.
  4. 90% models: check the drain trap, drain hoses and front cover (coil cover) pressure switch - a backed-up trap keeps the switch open.
  5. Connect a manometer to the switch tap and compare the negative pressure with the switch rating (see the Pressure switch trip points table). Enough vacuum but switch open = replace the switch.
  6. Not enough vacuum check inducer voltage and amps against its rating and correct the supply voltage or replace the inducer.
  7. Tighten or correct any loose wiring in the pressure switch circuit, then retest.

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Source: Goodman RS6612022r1 (GM9S92/GM9S96/GC9S96 service), 1 Stage Troubleshooting Codes, p.29-30; Goodman RS6621008r2 (GM9S80 service), p.32-33; Goodman RS6612020r1 (GM9C96 service), 2 Stage Troubleshooting Codes, p.35-36; Error Code E1, E2 flowchart p.52 (RS6612022r1), p.37 (RS6621008r2), p.40 (RS6612020r1); Checking Pressure Switch p.24. Summarized in our own words; check the original manual for your model.

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For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.