indicator code 34 (Ignition Proving Failure) is frequently caused by a cracked or heavily fouled sensor that can no longer prove flame to the furnace control board

Plug-and-Play Compatibility: Specifically calibrated for Comfort Sense 5000 series controls and compatible Lennox residential units

it is recommended to use genuine TB Woods components throughout the assembly

ensuring perfect alignment with 1" motor shafts

Is the Watts 0121504 interchangeable with the LF174A-1-125

Lennox 89J10 Blower Wheel R-134A indicator code 34 (Ignition ProvingWhen high static pressure or years of debris accumulation causes a failure in your air handler, the Lennox 89J10 Blower Wheel is the professional grade solution to restore factory spec airflow. This 10" x 8 1 2" direct drive blower wheel features a 1 2" bore, engineered for a precision fit on standard motor shafts to eliminate vibration and avoid premature bearing wear. With a 48 blade forward curve centrifugal fan design and a clockwise (CW) rotation