Coleman Error Codes

HVAC brand manufactured by Johnson Controls. Coleman furnaces are residential gas and electric heating systems sold through authorized HVAC dealers.

1 error codes across 1 appliance types

Furnace

Code	Meaning	Severity
3 Flash Code	The control board powered up the inducer motor but the pressure switch never closed, meaning it didn't detect enough vacuum in the flue system. That switch is basically confirming 'yes, exhaust is actually moving out of the house' before the gas valve opens. No confirmation, no gas, no heat. high	high