Lennox Error Code 312

Priority condition: Information Only-Dealer The indoor blower cannot provide the requested CFM due to excessive static pressure. This is a minor alert code. • Static pressure has exceeded the capability of the blower motor. • Possible restricted airflow - Indoor blower is running at a reduced CFM (cutback mode). • The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating outside of design parameters (0 to 0.8” e.g. total external static pressure). • Check air filter and duct system. • To clear, replace air filter if needed or repair or add additional ducting. NOTE: Blower motor cutbacks will not show alarm code. Duct static pressure reading must be taken.