Goodman Furnace Error Codes — Meanings, Causes & Repair in Greater Vancouver

Seeing a fault code on your Goodman furnace? This guide explains what the most common Goodman furnace error codes mean, what’s safe to check yourself, and when to call HeatLand’s licensed, TSBC-certified gas technicians for Goodman furnace repair across Metro Vancouver and the Fraser Valley.

The codes below apply across common Goodman models (GMVC, GMSS, GCSS, GMVM, GMS8, GMS9). Meanings follow Goodman’s documented fault codes — always confirm against your unit’s own manual, because exact wording can vary by model, control board and firmware.

How to read Goodman furnace error codes

Goodman uses two diagnostic systems depending on the furnace. (1) SINGLE-STAGE models (GMSS92/96, GCSS92/96, GMS8/GMS9, GCS8/GCS9) use a single red/amber LED on the integrated control board that you read through the sight window in the blower door: count the flashes, pause, then the sequence repeats (e.g. 4 flashes = open limit). Steady ON = normal; LED OFF = no power; rapid continuous flash = reversed polarity. (2) VARIABLE-SPEED / MODULATING & COMMUNICATING models (GMVC96, GMVS96, GMVM97, GCVM97) instead show an alphanumeric code on a dual 7-segment display (E0-EA, b0-b9, d0-d4, EE). Codes can vary by control-board revision, so always confirm against the diagnostic label printed inside the blower access door for the exact model.

Goodman furnace error codes & what they mean

These are the Goodman furnace codes our Greater Vancouver technicians see most. Anything marked pro repair involves gas, electrical, sealed-combustion or control-board work that must be done by a licensed gas technician (TSBC-certified in BC) — never open gas or electrical components yourself.

Code	What it usually means	Common causes	Safe to check yourself
LED OFF (no light)	No power to the integrated control board, or a faulty control. (Single-stage models) pro repair	Furnace switch off; Tripped breaker / blown line fuse; Open low-voltage fuse on the control board	Confirm the furnace power switch (looks like a light switch near the furnace) is ON; Check the breaker for the furnace and reset it once if tripped; Make sure the blower access door is fully closed (a door switch cuts power when open)
LED ON steady (no flashing)	Normal operation / standby. Power is present and no fault is stored. (Single-stage models) DIY-checkable	Normal condition, not a fault	No action needed; this indicates the control is healthy; If there is still no heat, set the thermostat to HEAT and above room temperature
1 flash	System / ignition lockout. The control failed to establish flame after three retries and shut off gas; auto-resets after 1 hour. (Single-stage models) pro repair	Dirty or failed flame sensor; Weak or cracked igniter; Interrupted gas supply / closed gas valve	Confirm the gas is on and other gas appliances (stove, water heater) work; Replace a dirty furnace filter; Cycle the thermostat off then on once to clear the lockout (or wait one hour for auto-reset)
2 flashes	Pressure switch stuck closed. The control reads the pressure switch closed while the inducer (draft) blower is off. (Single-stage models) pro repair	Stuck/failed pressure switch; Short in pressure-switch wiring; Water or condensate in the pressure-switch hose	Power-cycle the furnace once at the switch; Note the code for the technician (no homeowner-serviceable parts in this circuit)
3 flashes	Pressure switch stuck open. After the inducer starts, the pressure switch did not close, indicating inadequate draft. (Single-stage models) pro repair	Blocked, pinched, or disconnected pressure-switch hose; Blocked or restricted flue / intake vent piping; Blocked condensate drain (condensing models)	Check that outdoor vent/intake pipe terminals are clear of snow, ice, leaves, or nests; Power-cycle the furnace once
4 flashes	Open high-limit (or primary limit) switch. The control sensed the furnace overheating; the blower runs until the limit re-closes. (Single-stage models) pro repair	Dirty air filter restricting airflow; Closed/blocked supply registers or restrictive ductwork; Blower running too slow or failing	Replace or clean the air filter (most common cause); Make sure supply and return registers are open and unblocked; Confirm nothing is restricting return-air grilles
5 flashes	Flame sensed with no call for heat (flame detected while the gas valve should be off). The control runs the blowers and stops further firing. Potential safety issue. (Single-stage models) pro repair	Slow-closing or leaking gas valve; Lingering burner flame; Short to ground in the flame-sense circuit	Set the thermostat to OFF and note the code for the technician; Do not attempt repairs; this can indicate a gas-valve fault
6 flashes	Open flame-rollout switch, or low-voltage fuse blown. The rollout switch detects flame/heat outside the burner area. Serious safety condition. (Single-stage models) pro repair	Blocked or misaligned burners; Cracked or plugged heat exchanger; Blocked flue causing flame rollout	Turn the furnace OFF and leave it off; call a licensed technician promptly; Do not reset repeatedly; a rollout trip can indicate a combustion or heat-exchanger problem
7 flashes	Low flame-sense signal. The flame current (micro-amps) from the sensor is below the required level, so the control cannot reliably prove flame. (Single-stage models) pro repair	Coated or oxidized flame sensor; Flame sensor positioned incorrectly in the burner flame; Lazy/weak burner flame from improper gas pressure or combustion air	Replace a dirty air filter to improve combustion airflow; Note the code; flame-sensor cleaning/positioning is a technician task
Rapid / continuous flash	Reversed line-voltage polarity or poor grounding. With 115V/24V leads reversed or a bad ground, the furnace will not operate. (Single-stage models) pro repair	Line (hot) and neutral reversed at the furnace or receptacle; Poor / missing equipment ground; Reversed transformer 24V wiring	Note the code for the technician (this is an electrical-connection issue requiring a licensed professional)
E0 (display)	System lockout: control failed to sense flame after three full ignition retries and shut off gas. Resets by cycling the thermostat off 5-20 seconds then on, or auto-resets after 1 hour. (Variable-speed/communicating models) pro repair	Interrupted gas supply; Front-cover pressure switch stuck open; Bad or weak igniter	Confirm gas is on and other gas appliances work; Replace a dirty filter; Cycle the thermostat off (5-20 seconds) then back on to attempt a reset
E1 (display)	Low-stage pressure switch stuck closed: the switch is closed while the induced-draft blower is off. Control waits for the fault to clear. (Variable-speed/communicating models) pro repair	Pressure-switch contacts sticking; Short in the pressure-switch circuit wiring; Faulty pressure switch	Power-cycle the furnace once and note the code for the technician
E2 (display)	Low-stage pressure switch stuck open: the switch did not close within 5 minutes after the inducer energized; control goes into a 1-hour lockout then retries. (Variable-speed/communicating models) pro repair	Disconnected/blocked/pinched pressure-switch hose; Restricted air intake or flue piping; Weak induced-draft blower	Check that outdoor vent/intake terminals are clear of snow, ice, or debris; Power-cycle the furnace once
E3 (display)	Open primary, auxiliary, or rollout limit. The limit control opened; both blowers run until it closes. (Variable-speed/communicating models) pro repair	Low airflow from a dirty filter or restrictive ductwork; Blower speed set too low or failed blower; Misaligned burners	Replace or clean the air filter; Open all supply and return registers; Note the code for the technician
E4 (display)	Flame sensed with no call for heat. The control runs the circulator and inducer continuously with no further firing. Potential safety issue. (Variable-speed/communicating models) pro repair	Short to ground in the flame-sense circuit; Miswiring; Lingering burner flame	Set the thermostat to OFF and note the code; do not attempt repairs
E5 (display)	Open fuse. The control detected an open low-voltage fuse and inhibits all furnace operation except the error display. (Variable-speed/communicating models) pro repair	Short in low-voltage wiring internal to the furnace; Short in external low-voltage wiring (thermostat/accessory); Blown 24V control fuse	Note the code for the technician (fuse and wiring service is a professional task)
E6 (display)	Low flame-sense signal. The micro-amp signal from the flame sensor fell below the specified level during operation. (Variable-speed/communicating models) pro repair	Coated/oxidized flame sensor; Sensor incorrectly positioned in the burner flame; Lazy burner flame from improper gas pressure or combustion air	Replace a dirty air filter to support clean combustion airflow; Note the code; sensor cleaning/alignment is a technician task
E7 (display)	Check igniter or no-ground condition. The igniter is broken/improperly connected, or there is a grounding problem. (Variable-speed/communicating models) pro repair	Broken or cracked igniter; Loose / improper igniter connection; Missing or poor equipment ground	Note the code for the technician (the igniter is fragile and must be handled and replaced by a professional)
E8 (display)	High-stage pressure switch stuck closed. The furnace runs in low stage only regardless of thermostat demand. (Variable-speed/communicating models) pro repair	Sticking high-stage pressure switch contacts; Short in the high-stage pressure-switch wiring	Note the code for the technician; furnace may still produce some heat in low stage
E9 (display)	High-stage pressure switch stuck open (the high-stage circuit will not close during high-stage inducer operation). (Variable-speed/communicating models) pro repair	Blocked or pinched pressure-switch hose; Blocked flue and/or inlet air pipe; Blocked condensate drain	Check that outdoor vent/intake terminals are clear of obstructions; Note the code for the technician
EA (display)	Reversed polarity. The 115V or 24V AC leads are reversed, or there is a poor unit ground; the furnace will not operate. (Variable-speed/communicating models) pro repair	115V line/neutral reversed at the furnace; 24V transformer wires reversed; Poor or missing equipment ground	Note the code for the technician (electrical-connection issue requiring a licensed professional)
EE (display)	Internal / no 115V power: no 115V power reaching the control, or an internal control condition (manual disconnect, fuse, or wiring). (Variable-speed/communicating models) pro repair	Manual disconnect or furnace switch off; Blower/access door switch open; Tripped breaker / blown line fuse	Confirm the furnace switch is ON and the breaker is not tripped; Make sure the blower access door is fully closed; Power-cycle the furnace once
b0 (display)	ECM blower motor not running: the control does not detect the variable-speed blower running when it should be. Furnace will not operate. (Variable-speed/communicating models) pro repair	Loose/disconnected wiring between motor and control; Open inductor (3/4 HP and 1 HP motors); Failed ECM blower motor	Note the code for the technician (no homeowner-serviceable parts)
b1 (display)	ECM motor communications lost: the furnace control cannot communicate with the variable-speed blower motor. Furnace will not operate. (Variable-speed/communicating models) pro repair	Loose/disconnected wiring between motor and control; Failed ECM blower motor; Failed control board	Power-cycle the furnace once and note the code for the technician
b2 (display)	Motor horsepower mismatch: the connected motor HP does not match the value in the furnace's shared data set. Furnace will not operate. (Variable-speed/communicating models) pro repair	Wrong replacement motor installed; Incorrect shared data set / memory card for the model	Note the code for the technician (requires correct motor and/or memory card)
b3 (display)	ECM motor operating in a limiting condition (power, speed, or temperature limit). The furnace keeps running at reduced performance/airflow. (Variable-speed/communicating models) pro repair	Blocked/clogged filters; Blocked, restrictive, or undersized ductwork; High ambient temperature around the motor	Replace or clean the air filter; Open all registers and clear return-air grilles; Note the code if reduced airflow continues
b4 (display)	Motor trips: the ECM motor detected a loss of control (lost rotor) or an overload/current trip; it shuts down and restarts. Furnace may halt. (Variable-speed/communicating models) pro repair	Sudden duct blockage or sudden high motor loading (lost rotor); Overload from blocked/clogged filters; Blocked, restrictive, or undersized ductwork	Replace or clean the air filter; Open registers and clear return grilles; Power-cycle the furnace once
b5 (display)	Motor locked rotor: the ECM motor failed to start after 10 consecutive attempts. Furnace will not operate. (Variable-speed/communicating models) pro repair	Obstruction in the blower housing or wheel; Seized motor bearings; Failed blower motor	Note the code for the technician (do not open the blower compartment)
b7 (display)	Motor parameters: the motor did not receive required information, an event prevented it from running, or it failed to start after 40 consecutive attempts. (Variable-speed/communicating models) pro repair	Intermittent wiring between control and motor; Furnace control error; Same conditions as motor-trip, locked-rotor, or motor-volts faults	Note the code for the technician
b9 (display)	Low indoor airflow: indoor airflow fell below the calculated minimum; the furnace stages down (high to low) to compensate and halts if airflow reaches 0 CFM. (Variable-speed/communicating models) pro repair	Blocked/clogged filters; Blocked or restrictive ductwork; Undersized ductwork	Replace or clean the air filter; Open all supply and return registers and clear return grilles
d0 (display)	No shared data: the control contains no shared data set, so it cannot drive the variable-speed motor or calculate airflow. A model-specific memory card must be installed. (Variable-speed/communicating models) pro repair	Replacement control board never loaded with shared data; Missing memory card	Note the code for the technician (requires a model-specific memory card from the distributor)
d4 (display)	Invalid memory card data: the control rejected the shared data on the memory card (wrong model card used). (Variable-speed/communicating models) pro repair	Memory card from a different furnace model installed; Corrupt/incorrect shared data set	Note the code for the technician (requires the correct model-specific memory card)

Goodman furnace codes we get called for most

1 flash — System / ignition lockout. The control failed to establish flame after three retries and shut off gas; auto-resets after 1 hour. (Single-stage models)

Typical causes include dirty or failed flame sensor; weak or cracked igniter; interrupted gas supply / closed gas valve. A few things are safe to check yourself (Confirm the gas is on and other gas appliances (stove, water heater) work; Replace a dirty furnace filter), but the repair is a licensed, TSBC-certified gas technician job. HeatLand diagnoses and fixes 1 flash on Goodman furnaces throughout Greater Vancouver.

2 flashes — Pressure switch stuck closed. The control reads the pressure switch closed while the inducer (draft) blower is off. (Single-stage models)

Typical causes include stuck/failed pressure switch; short in pressure-switch wiring; water or condensate in the pressure-switch hose. A few things are safe to check yourself (Power-cycle the furnace once at the switch; Note the code for the technician (no homeowner-serviceable parts in this circuit)), but the repair is a licensed, TSBC-certified gas technician job. HeatLand diagnoses and fixes 2 flashes on Goodman furnaces throughout Greater Vancouver.

4 flashes — Open high-limit (or primary limit) switch. The control sensed the furnace overheating; the blower runs until the limit re-closes. (Single-stage models)

Typical causes include dirty air filter restricting airflow; closed/blocked supply registers or restrictive ductwork; blower running too slow or failing. A few things are safe to check yourself (Replace or clean the air filter (most common cause); Make sure supply and return registers are open and unblocked), but the repair is a licensed, TSBC-certified gas technician job. HeatLand diagnoses and fixes 4 flashes on Goodman furnaces throughout Greater Vancouver.

Is it safe to keep running a Goodman furnace with a fault code?

Most Goodman fault codes put the furnace into a safe lockout for a reason. You can safely check the basics — the furnace switch and breaker on, a clean air filter, the gas supply on, the thermostat set to heat and calling, and — on high-efficiency models — the condensate drain not blocked or frozen — and restart it once. If the code returns, stop and book a technician. If you ever smell gas, leave the building and call your gas utility’s emergency line or 911 first. If a carbon-monoxide alarm sounds, get everyone out and call 911. A rollout or repeated limit trip can signal a heat-exchanger or venting problem — don’t keep resetting it.

Goodman furnace repair across Greater Vancouver

HeatLand has kept Metro Vancouver homes comfortable since 1999. Our licensed, insured technicians diagnose and repair Goodman furnaces — ignition and flame-sensor faults, pressure-switch and venting problems, limit and rollout trips, blower and igniter issues, and control-board errors — including units we didn’t install. We’re brand-agnostic, carry common parts, and give you an honest repair-or-replace assessment with upfront pricing and a free estimate. If your furnace is beyond economical repair, we’ll show you right-sized, high-efficiency replacement options and the rebates available.

Need it sorted fast? We offer priority emergency furnace repair. Explore Furnace services, browse all furnace error codes by brand, or request a free estimate.

Goodman furnace service areas

We repair Goodman furnaces across Greater Vancouver and the Fraser Valley, including:

Goodman furnace error code FAQs

Can I reset my Goodman furnace myself?

Yes — power-cycling the reset button once is generally safe after you’ve checked the basics (the furnace switch and breaker on, a clean air filter, the gas supply on, the thermostat set to heat and calling, and — on high-efficiency models — the condensate drain not blocked or frozen). If the furnace faults again right away, stop and note the code — repeatedly resetting a furnace that keeps locking out can mask a real problem. Call a licensed, TSBC-certified gas technician to diagnose it.

What does the Goodman 1 flash code mean?

On Goodman furnaces, 1 flash commonly indicates system / ignition lockout. the control failed to establish flame after three retries and shut off gas; auto-resets after 1 hour. (single-stage models). Confirm the exact meaning against your unit’s manual — codes can vary by model and series — and have the repair done by a licensed, TSBC-certified gas technician. HeatLand fixes this across Greater Vancouver.

Do you repair Goodman furnaces you didn’t install?

Yes. HeatLand is brand-agnostic and services Goodman furnaces throughout Metro Vancouver and the Fraser Valley, whether or not we installed the unit. We carry common parts and give you an honest repair-or-replace assessment.

Is a Goodman furnace fault code an emergency?

No heat in cold weather is worth treating urgently. If you ever smell gas, leave the building and call your gas utility’s emergency line or 911 first. If a carbon-monoxide alarm sounds, get everyone out and call 911. A rollout or repeated limit trip can signal a heat-exchanger or venting problem — don’t keep resetting it. For priority furnace repair across Greater Vancouver, call (604) 330-3812.

How much does Goodman furnace repair cost in Vancouver?

It depends on the fault. Many Goodman codes point to sensors, ignition or pump parts — usually far cheaper than replacement. We give upfront pricing and a free estimate before any work.

More Furnace error-code guides

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