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Goodman Furnace Error Codes

Goodman gas furnaces flash a diagnostic LED on the control board a set number of times, and newer models show a two-character code such as E2 or d0. Below are 28 Goodman codes across 2 model series. Each one says what it means, which series it applies to, what you can safely check, and when to call a licensed pro, with a link to the Goodman document it comes from.

The same code can mean different things on different series, so match the series column to your unit. Your unit's manual is the final word. Reviewed October 2026.

🔎 Enter the code, blink count or model shown on your unit

28 codes

All Goodman error codes

Code	Meaning	Applies to	Safety
E0 Three-digit 7-segment display shows EE0	Lockout after three failed ignition attempts	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🧭 Check first
E1 Three-digit 7-segment display shows EE1	Low-stage pressure switch closed at start of heating	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E2 Three-digit 7-segment display shows EE2	Low-stage pressure switch circuit open	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E3 Three-digit 7-segment display shows EE3	Primary limit circuit open (furnace overheating)	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🧭 Check first
E4 Three-digit 7-segment display shows EE4	Flame sensed with no call for heat	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E5 Three-digit 7-segment display shows EE5	Open fuse on the control	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E6 Three-digit 7-segment display shows EE6	Weak flame sense signal	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E7 Three-digit 7-segment display shows EE7	Problem with igniter circuit	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E8 Three-digit 7-segment display shows EE8	High-stage pressure switch closed at start of heating	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E9 Three-digit 7-segment display shows EE9	High-stage pressure switch circuit open	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
EA Three-digit 7-segment display shows EEA	Reversed 115 volt polarity	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
Eb Three-digit 7-segment display shows EEb	External gas valve error (valve not energized)	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
EC Three-digit 7-segment display shows EEC	Internal gas valve error (valve energized when it should not be)	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
Ed Three-digit 7-segment display shows EEd	Auxiliary limit switch open (blower compartment)	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🧭 Check first
EF Three-digit 7-segment display shows EEF	Condensate (AUX) switch open	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🧭 Check first
E10 Three-digit 7-segment display shows E10	Grounding fault	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
E11 Three-digit 7-segment display shows E11	Open rollout switch	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
b0 Three-digit 7-segment display shows Eb0 (flowchart name B0)	Circulator blower motor not running	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
d0 Three-digit 7-segment display shows Ed0	Data not yet on network	Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces	🛑 Call a pro
1 flash Diagnostic LED seen through the blower door window	Ignition lockout (no flame)	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🧭 Check first
2 flashes Diagnostic LED seen through the blower door window	Pressure switch stuck closed	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
3 flashes Diagnostic LED seen through the blower door window	Pressure switch stuck open	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
4 flashes Diagnostic LED seen through the blower door window	Open primary or auxiliary limit	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🧭 Check first
5 flashes Diagnostic LED seen through the blower door window	Flame sensed with no call for heat	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
6 flashes Diagnostic LED seen through the blower door window	Open rollout limit	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
7 flashes Diagnostic LED seen through the blower door window	Low flame sense signal	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
8 flashes Diagnostic LED seen through the blower door window	Igniter circuit fault or poor ground	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro
Continuous flash Diagnostic LED seen through the blower door window	Reversed polarity or poor ground (continuous or rapid flash)	Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)	🛑 Call a pro

✅ Usually fine to keep running · 🧭 Check a few things first · 🛑 Turn it off and call a licensed pro

Find your Goodman model series

The codes Goodman documents for each series we have checked. If your series is not listed, the code may mean something different on your unit, so check its manual.

Goodman GMS8 / Amana AMS8 / GDS8 / ADSS8 80% single-stage gas furnaces (older flash-code control)

1 flash 2 flashes 3 flashes 4 flashes 5 flashes 6 flashes 7 flashes 8 flashes Continuous flash

Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces

E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA Eb EC Ed EF E10 E11 b0 d0

More Goodman codes

Goodman E1: Low-stage pressure switch closed at start of heating

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE1

The control sees the low-stage pressure switch circuit closed at the start of a heating cycle, when it should be open. The manual lists sticking switch contacts or a short in the pressure switch wiring as possible causes.

When to call a pro: Turn the furnace off and call a licensed technician. The pressure switch or its wiring needs to be tested and replaced if faulty.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.41

Goodman E4: Flame sensed with no call for heat

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE4

The control senses flame when the gas valve should be off. The manual lists a short to ground in the flame sense circuit, a lingering burner flame or a slow closing gas valve.

When to call a pro: Turn the thermostat to Off and call a licensed technician. If you smell gas, leave the house and call your gas utility from outside.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.42 (table) and p.51 (flowchart)

Goodman E5: Open fuse on the control

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE5

The control reports an open fuse. The manual lists a short in the low voltage wiring as the possible cause.

When to call a pro: Call a licensed technician. The manual says to locate and correct the short in the low voltage wiring and replace the fuse with a 3-amp automotive type.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.42

Goodman E7: Problem with igniter circuit

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE7

The control found a problem in the igniter circuit. The manual lists an improperly connected or shorted igniter, a poor furnace ground or a control igniter relay fault.

When to call a pro: Call a licensed technician. Igniter wiring, ground and relay checks involve line voltage and the control board.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.42

Goodman E8: High-stage pressure switch closed at start of heating

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE8

The high-stage pressure switch circuit is closed at the start of a heating cycle when it should be open. The manual lists sticking switch contacts or a short in the pressure switch wiring.

When to call a pro: Call a licensed technician to test or replace the high-stage pressure switch and check its wiring.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.42

Goodman E9: High-stage pressure switch circuit open

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EE9

The high-stage pressure switch circuit is not closing on high stage. The manual lists a blocked hose, blocked flue or inlet air pipe, blocked drain system, a weak induced draft blower or a wrong switch setpoint.

When to call a pro: Call a licensed technician. Venting, pressure switch and inducer checks are combustion safety work.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.42

Goodman Eb: External gas valve error (valve not energized)

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EEb

The gas valve is not energized when it should be. The manual lists a miswired or open gas valve circuit or a stuck-open gas valve relay on the control board.

When to call a pro: Call a licensed technician. Gas valve wiring and control board replacement are service work.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.44

Goodman EC: Internal gas valve error (valve energized when it should not be)

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EEC

The gas valve is energized when it should not be. The manual lists a miswired or shorted gas valve circuit or a gas valve relay on the control board stuck open.

When to call a pro: Turn the thermostat to Off and call a licensed technician right away. If you smell gas, leave the house and call your gas utility from outside.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.44

Goodman Ed: Auxiliary limit switch open (blower compartment)

🧭 Check a few things first

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows EEd

The auxiliary limit switch in the blower compartment is open. The manual lists a 115 volt power loss during the heat cycle or too little air over the heat exchanger from blocked filters, restrictive ductwork or a blower problem.

When to call a pro: If it repeats after a clean filter and open vents, call a licensed technician to check the blower and wiring.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.44

Goodman E10: Grounding fault

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows E10

The control reports a grounding fault. The manual lists a poor neutral connection as the possible cause.

When to call a pro: Call a licensed electrician or HVAC technician to verify the neutral wire connection and ground.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.43

Goodman b0: Circulator blower motor not running

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows Eb0 (flowchart name B0)

The circulator blower motor is not running when it should be. The manual lists a loose or disconnected motor lead, an open inductor circuit or a failed blower motor.

When to call a pro: Call a licensed technician to check the blower motor, inductor and wiring.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.40 (table) and p.47 (flowchart)

Goodman d0: Data not yet on network

🛑 Turn it off and call a licensed pro

Applies to: Goodman GMVC96 / Amana AMVC96 / GCVC96 / ACVC96 34.5-inch chassis two-stage gas furnaces. Shows as: Three-digit 7-segment display shows Ed0

The control reports data not yet on the network. The manual says the shared data set must be populated with the CoolCloudHVAC App.

When to call a pro: Call a licensed technician. Loading the shared data set requires the installer app and the correct parts.

Source: Goodman 34.5 in. Chassis ACVC96/AMVC96/GCVC96/GMVC96 Service and Troubleshooting RS6612023R2, p.41

Safe first steps for any code

Count the LED flashes through the blower door window before you switch anything off. Cutting power can clear the code.
Replace or clean the furnace air filter.
Check the thermostat: correct mode, set above room temperature, and fresh batteries.
Make sure the furnace power switch and breaker are on. If the furnace has locked out, turning the power off and back on once restarts it.
Make sure the gas valve is in the ON position, following the lighting instructions on the furnace label only.
On high-efficiency furnaces, look at the outside vent and intake pipes for snow, ice, leaves or nests (look only, do not take pipes apart).

🛑 Stop and call a licensed pro if

You smell gas. Leave the house, do not touch switches, and call your gas utility from outside.
Flame rollout, limit or pressure switch codes that come back after one reset.
Anything involving the control board, gas valve, flame sensor, igniter or venting.
A carbon monoxide alarm sounds. Get everyone outside and call 911 or the fire department.

Shaun Cain · Certified HVAC & Refrigeration Technician · Ask an HVAC technician

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