How House Works

Goodman furnace 2 flashes: pressure switch closed (single-LED boards)

By How House Works EditorialBased on Goodman service manuals and installation instructionsChecked against sources Updated

Furnace control display or LED

2 flashes

“Pressure switch circuit is closed.”

GMES9* / GCES9* / AMES9* / ACES9* / VMES9* / VCES9*, GMES80 / GCES80 / AMES80 / ACES80 / VMES80 / VCES80, GMSS9* / GCSS9* / AMSS9* / ACSS9*, GKS9 / AKSS92, GMS8 / AMS8 / GDS8 / ADSS8, GMH8 / AMH8 / GDH8 / ADSH8, GMH95 / AMH95 / GCH95 / ACSH96, GME95 / AMEH96, GME8 / AMEH8 · IOG-2020J p. 40; IOG-2021H p. 29; IOG-2009Q p. 42; RS6612004R2 p. 49; RS6612006R7 p. 43; RS6612007R4 p. 41; RS6612003R2 p. 54; RS6612005R1 p. 49; RS6621001R2 p. 35
Technician

What it means

On Goodman and Amana furnaces with a single diagnostic LED, two flashes between pauses mean the control sees the pressure switch circuit closed while the induced draft blower is not operating. The furnace fails to operate IOG-2020J, p. 40; RS6612012R8, p. 44. On boards with a three-character display a similarly worded code is EE1, “Pressure switch circuit is closed at start of heating cycle” IOG-2029D, p. 39.

The GMES9 and GMSS9 tables give two causes: the induced draft blower pressure switch contacts are sticking, or there is a short in the pressure switch circuit IOG-2020J, p. 40; RS6612012R8, p. 44.

On three-color boards two flashes mean something else, and on GMEC96 and GMEC80 boards two amber flashes are normal operation (see the notes below).

Check these first

The owner’s manual gives no step for this code, and none of the causes in the tables is something it leaves to the owner. Its instruction for a flashing LED HIG-2002A, p. 8:

  1. Count the flashes between pauses through the blower compartment sight glass and write the number down HIG-2002A, p. 8. If your LED flashes red, amber or green, use the notes below instead.
  2. Shut the furnace down: thermostat to its lowest setting (the control closes the gas valve and the blowers stop after a delay), remove the burner compartment door, move the gas valve’s ON/OFF switch to OFF, close the external manual gas shut-off valve and put the door back HIG-2002A, p. 6. Before the gas control goes to OFF, the start-up steps and the label also turn off the electrical power to the furnace; the label says to do so if service is to be performed HIG-2002A, pp. 6, 9. Move the gas control by hand only, never with tools; if it will not move, call a qualified service technician HIG-2002A, p. 9. Full steps: shutting the furnace down.
  3. Contact a qualified servicer HIG-2002A, p. 8.

The manual asks you not to go further: “Do not attempt repairs yourself” HIG-2002A, p. 8, and “do not remove any internal compartment covers” HIG-2002A, p. 6. The rest of its checklist (thermostat, circuit breakers and fuses, filters, grilles, intake and vent terminations, in that order) is for a furnace whose LED is not flashing HIG-2002A, p. 8.

When to call a licensed technician

  • Replacing the induced draft blower pressure switch with the proper replacement part IOG-2020J, p. 40; RS6612012R8, p. 44.
  • Finding and repairing a short in the pressure switch circuit IOG-2020J, p. 40; RS6612012R8, p. 44.
  • On GMEC96 and GMEC80 boards with red 2 flashes, the table’s check list is a faulty pressure switch, shorted pressure switch wires, or a control board inducer relay stuck closed GMEC96: IOG-2011U, p. 54; GMEC80: RS6621005R1, p. 28.

The GMES9 and GMSS9 tables say to turn power OFF before any repair IOG-2020J, p. 40; RS6612012R8, p. 44.

Notes for different models

Board or series Code Meaning in the table Source
Single LED: GMES9, GMES80, GMSS9, GKS9, GMS8, GMH8, GMH95, GME95, GME8 2 flashes “Pressure switch circuit is closed.” with “Induced draft blower is not operating.” IOG-2020J, p. 40; IOG-2009Q, p. 42
GMEC96, GMEC80 Red 2 flashes “Pressure switch stuck closed” IOG-2011U, p. 54 (GMEC96); RS6621005R1, p. 28 (GMEC80)
GMEC96, GMEC80 Amber 2 flashes “Normal operation with high or single stage call for heat” IOG-2011U, p. 54 (GMEC96); RS6621005R1, p. 28 (GMEC80)
GMEC96, GMEC80 Green 2 flashes “Normal operation with high or single stage call for cooling (Y & G)” IOG-2011U, p. 54 (GMEC96); RS6621005R1, p. 28 (GMEC80)
MES96U, GMES80*U, 2019 manuals Red 2 flashes “Pressure sensor indicates pressure reading when it should be zero.” RS6612017, p. 20; RS6621006, p. 16
MES96U, GMES80*U, 2019 manuals Amber 2 flashes “ID plug failure” RS6612017, p. 21
MES96U, GMES80*U, 2019 manuals Green 2 flashes “Call for cooling.” RS6612017, p. 21
Three-character display EE1 “Pressure switch circuit is closed at start of heating cycle” IOG-2029D, p. 39
Older ComfortNet two-character boards E1 (thermostat: PS1 CLOSED) “Low stage pressure switch circuit is closed at start of heating cycle.” RS6612010R6, p. 47

The GMEC96 and GMEC80 tables add “possible inducer operation” to the symptom of red 2 flashes GMEC96: IOG-2011U, p. 54; GMEC80: RS6621005R1, p. 28. On older ComfortNet boards E2 is a different fault, “Low stage pressure switch circuit is not closed.” RS6612010R6, p. 48; a pressure switch circuit that is not closed is 3 flashes on single-LED boards.

Related Goodman codes

  • EE1 “Pressure switch circuit is closed at start of heating cycle”
  • 3 flashes “Pressure switch circuit not closed.”
  • Red 2 flashes “Pressure switch stuck closed”
  • Amber 2 flashes “Normal operation with high or single stage call for heat”

See also

Other gas furnaces: Carrier, Lennox, Rheem and Ruud

All Goodman codes

Goodman is a trademark of its owner. How House Works is not affiliated with or endorsed by Goodman.

Sources

  1. Goodman Manufacturing. Gas-Fired Warm Air Furnace User's Information Manual. HIG-2002A, 09/19. Accessed Oct 17, 2026.
  2. Goodman Manufacturing. Gas-Fired Warm Air Furnace User's Information Manual. HIG-2002, 07/19. Accessed Oct 17, 2026.
  3. Goodman Manufacturing. Service manual: 34.5" Chassis ACVC96/AMVC96 GCVC96/GMVC96 Gas Furnaces. RS6612010R6, November 2017. Accessed Oct 19, 2026.
  4. Goodman Manufacturing. Installation Instructions for *MES9* & *CES9* Single-Stage Gas Furnace. IOG-2020J, 04/2022. Accessed Oct 19, 2026.
  5. Goodman Manufacturing. Installation Instructions for *M9S96/*C9S96 & *M9S92 Single-Stage Gas Furnace. IOG-2029D, 07/2023. Accessed Oct 17, 2026.
  6. Goodman Manufacturing. Installation Instructions for *MES80 / *CES80 Gas Furnace. IOG-2021H, 02/2022. Accessed Oct 19, 2026.
  7. Goodman Manufacturing. Installation Instructions for *MSS9* & *CSS9* Single-Stage Gas Furnace. IOG-2009Q, 08/2022. Accessed Oct 19, 2026.
  8. Goodman Manufacturing. Service manual: GKS9 / AKSS92 Single Stage Up-Flow Gas Furnaces and Accessories. RS6612004R2, November 2014. Accessed Oct 19, 2026.
  9. Goodman Manufacturing. Service manual: Goodman & Amana Brand 80% Single Stage Gas Furnaces GMS8, AMS8, GDS8, ADSS8 & Accessories. RS6612006R7, November 2017. Accessed Oct 19, 2026.
  10. Goodman Manufacturing. Service manual: 33 3/8" 80% Modified Two Stage Gas Furnaces AMH8, GMH8, GDH8, ADSH8 & Accessories. RS6612007R4, July 2018. Accessed Oct 19, 2026.
  11. Goodman Manufacturing. Service manual: Goodman Brand & Amana Brand 96% Modified Two Stage Furnace GMH95, AMH95, GCH95, ACSH96. RS6612003R2, November 2014. Accessed Oct 19, 2026.
  12. Goodman Manufacturing. Service manual: Goodman Brand GME95 & Amana Brand AMEH96 Modified Two Stage Furnace with EEM Motor. RS6612005R1, November 2014. Accessed Oct 19, 2026.
  13. Goodman Manufacturing. Service manual: GME8 & AMEH8 Modified Two Stage Furnace with EEM Motor. RS6621001R2, August 2016. Accessed Oct 19, 2026.
  14. Goodman Manufacturing. Service manual: GMSS9*/GCSS9*/AMSS9*/ACSS9* Single Stage Gas Furnaces and Accessories. RS6612012, August 2014. Accessed Oct 17, 2026.
  15. Goodman Manufacturing. Service manual: GMSS9*/GCSS9*/AMSS9*/ACSS9* Single Stage Gas Furnaces and Accessories. RS6612012R8, December 2017. Accessed Oct 19, 2026.
  16. Goodman Manufacturing. Installation Instructions for *MEC96 Upflow / Horizontal Two-Stage Gas Furnace. IOG-2011U, 02/2022. Accessed Oct 19, 2026.
  17. Goodman Manufacturing. Service manual: Goodman Brand GMEC80/GCEC80 & Amana Brand AMEC80/ACEC80 Two Stage Furnace with multi-speed ECM Motor. RS6621005R1, June 2020. Accessed Oct 19, 2026.
  18. Goodman Manufacturing. Service manual: *MES96*U Single Stage Ultra-Low NOx Gas Furnaces and Accessories. RS6612017, October 2019. Accessed Oct 17, 2026.
  19. Goodman Manufacturing. Service manual: 80% Single Stage Ultra-Low NOx Gas Furnaces GMES80*U* & AMES80*U* & Accessories. RS6621006, October 2019. Accessed Oct 17, 2026.