Goodman MVS80 / CVS80 ultra-low NOx furnaces error codes

8 furnace error codes for Goodman MVS80 / CVS80 ultra-low NOx furnaces, what each one means and what to try, paraphrased from Goodman's own source. Codes vary by model, so confirm in your own manual.

Safety. The manual says only trained, qualified service personnel should install, repair or service this furnace. Source: Service and Troubleshooting RS6612019, *MVS80*U and *CVS80*U ultra-low NOx furnaces (Goodman).

All codes

E0 Lockout after too many ignition retries (3 total).
E3 Primary limit circuit is open (often overheating).
E4 Flame sensed with no call for heat.
E6 Flame sense micro amp signal is minimal.
Eb Gas valve is not energized when it should be.
EC Gas valve is energized when it should not be.
B0 Circulator blower motor not running when it should.
E11 Roll-out switch is open (flame rolled out).

E0

What it means: Lockout after too many ignition retries (3 total). This one often needs a licensed technician.

What to try

Have a technician verify the supply gas, the ignitor and the gas valve.

E3

What it means: Primary limit circuit is open (often overheating). This one often needs a licensed technician.

What to try

Check for blocked filters and verify the registers are fully open.
Have a technician check the ductwork.

E4

What it means: Flame sensed with no call for heat. This one often needs a licensed technician.

What to try

Shut off gas and call a technician.

E6

What it means: Flame sense micro amp signal is minimal. This one often needs a licensed technician.

What to try

Have a technician check the furnace ground wiring.

Eb

What it means: Gas valve is not energized when it should be. This one often needs a licensed technician.

What to try

Call a technician.

EC

What it means: Gas valve is energized when it should not be. This one often needs a licensed technician.

What to try

Shut off gas and call a technician.

B0

What it means: Circulator blower motor not running when it should. This one often needs a licensed technician.

What to try

Call a technician.

E11

What it means: Roll-out switch is open (flame rolled out). This one often needs a licensed technician.

What to try

Shut off the furnace and call a technician.

Source

Service and Troubleshooting RS6612019, *MVS80*U and *CVS80*U ultra-low NOx furnaces (Goodman) (checked 2026-11-02)

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Source checked 2026-11-02