Goodman Furnace LED Flash Codes: GMVC and GMSS Guide

Quick Answer

Goodman furnaces display fault codes via an LED on the control board using a flash pattern. Short blinks represent the tens digit and long blinks represent the ones digit.

I've been fixing Goodman furnaces for fifteen years and honestly they're pretty good at telling you what's wrong if you know how to listen. Flash codes usually point to cheap fixes like frozen condensate lines or a dirty flame sensor. But ignore that blinking light long enough and a $20 sensor swap turns into a cracked heat exchanger. Don't let it get there. Most of these codes resolve in under an hour.

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About These Goodman Furnace Error Codes

When your Goodman stops heating, the control board logs the fault immediately and starts blinking a code. Here's the thing though, look through that small plastic sight glass on the lower blower door BEFORE you unscrew anything. If you pull the door off first, the door safety switch cuts power and wipes the code. Then we're both standing there guessing. Codes can save you a service call if you catch them first.

Most Common Error Codes

Clogged condensate drain line triggering pressure switch codes40%

Dirty or failed hot surface ignitor causing F01/EE3/EE524%

Failed inducer motor causing 7P1 or E314%

Fouled flame sensor causing EAF or E1C12%

Tripped rollout switch indicating heat exchanger or venting problem10%

Symptoms You May Notice

Furnace kicks on, you hear the inducer spin up, burners try to light, everything shuts down within a few seconds, and the whole startup cycle repeats two or three times before locking out completely.
LED on the control board flashing a specific short-long pattern you can count through the sight glass on the blower door.
Blower motor running full blast but the air coming out of your registers is room temperature or actually cold.
No click from the ignitor and no whomp of the burners lighting, just a quiet inducer spinning up then cutting out with nothing happening.
Water dripping inside the lower blower cabinet, sometimes with visible ice in the condensate trap or the drain tubing running to the floor.

Tools Required for Diagnosis

Phillips #2 screwdriverFlathead screwdriverMultimeter with microamps setting (for flame sensor testing)Flashlight or headlampScotch-Brite pad (for flame sensor cleaning)Bucket and wet/dry vac (for condensate drain clearing)Replacement air filter in the correct size for your unit

How to Identify Your Error Code

Frequently Asked Questions

How do I read a Goodman furnace LED flash code?

Watch the rhythm. Short rapid blinks come first and that's your tens digit. Then a short pause. Then slower longer blinks for the ones digit. Two short, five long equals code 25. The sequence repeats every few seconds so if you miss it just wait. On newer GMVC96 units you'll sometimes see an actual alphanumeric display like F01 or EE3 right on the control board, which honestly makes my job a lot easier on a service call than standing there counting blinks with a flashlight in my teeth.

Where is the LED on my Goodman furnace?

It's mounted on the integrated control board in the lower blower compartment. You can usually spot it through the small sight glass on the lower door without removing any panels. Look for a blinking amber or red light. If you see nothing at all, check your circuit breaker first, then look for the service switch on the side of the furnace cabinet. A lot of people don't realize there's a dedicated switch up there and someone accidentally flipped it off. I've been called out for that exact thing more times than I'd like to admit.

Can I reset a Goodman furnace code myself?

Yeah, most of the time. Cycle the power switch off for 30 seconds and back on. That clears soft lockouts from stuff like a momentary pressure spike or a one-time ignition hiccup. But if the furnace locks out again within one or two heating cycles, something physical is broken and the reset isn't actually fixing anything. Safety codes like E2 or a rollout trip are the furnace literally protecting you. Don't keep resetting it hoping it'll stick. That's how carbon monoxide ends up in a house.

What is the most common Goodman furnace error code?

F01 and F02 show up constantly. F01 is almost always a dirty flame sensor, which is a five-minute fix. Pull one screw, slide out a small metal rod, scrub the oxidation off with a Scotch-Brite pad, reinstall it. Done. F02 is the pressure switch and it's usually a blocked condensate drain or a plugged exhaust vent. I've pulled bird nests, mud dauber nests, and once a legitimate hornets nest out of PVC vent terminations on the side of houses. Check outside before you do anything else with an F02.

How much does it cost to fix a Goodman furnace fault code?

Depends completely on the code. A dirty flame sensor causing F01 costs you basically nothing, maybe $5 for a Scotch-Brite pad. New hot surface ignitor is $20-50 in parts and you can swap it yourself in 20 minutes. Pressure switch replacement runs $30-80. Now if you've got a rollout switch that keeps tripping after you reset it, that could mean a cracked heat exchanger, and that's either $500-1500 in parts or, on a furnace that's already 15 years old, it might honestly make more financial sense to replace the whole unit rather than pour money into it.

Related Goodman Furnace Error Codes

Code: F02Goodman Furnace F02 Error Code: Pressure Switch Stuck Closed Code: 7P1Goodman Furnace 7P1 Error Code: Inducer Motor Fault Code: F01Goodman Furnace F01 Error Code: Ignition Failure After 3 Attempts Code: 9HGoodman Furnace 9H Error Code: High Pressure Switch Open Code: E1CGoodman Furnace E1C Error Code: Flame Sense Without Call for Heat Code: E2Goodman Furnace E2 Error Code: Rollout Switch Open Code: EE3Goodman Furnace EE3 Error Code: 3 Consecutive Ignition Lockouts Code: EE5Goodman Furnace EE5 Error Code: 5 Consecutive Ignition Lockouts Code: EAFGoodman Furnace EAF Error Code: Abnormal Flame Sense Code: E3Goodman Furnace E3 Error Code: Draft Inducer Blower Fault Code: E5Goodman Furnace E5 Error Code: Pressure Switch Error Code: 1DLGoodman Furnace 1DL Error Code: Watchdog Lockout Code: RESETHow to Reset a Goodman Furnace and Clear Error Codes

Same Fix on Other Brands

Carrier furnaceCarrier Furnace LED Flash Codes Guide

Models Known to Experience HUB Errors

This repair applies to most Goodman furnaces with this error code. Common model numbers include:

GMVC96, GMVC80, GMSS92, GMSS96, GCVC96, AMVC96, ASST96, GMEC96

Written by

Raj Patel

HVAC & Water Systems Specialist · 15 years experience

Last verified for technical accuracy on March 14, 2026