Learn to troubleshoot ULN furnace transducers, focusing on the common ‘23.3’ fault code. This guide covers testing supply and feedback voltages with a voltmeter, understanding pressure switches and transducers, and identifying acceptable voltage ranges for proper function. Discover the new HK05ZZ017 transducer model and concepts like rich and lean burns for combustion efficiency.
00:00 – Understanding Fault Code 23.3 & Transducer Role 03:36 – Standby Mode and Fault Ranges 05:38 – Testing the Transducer with a Multimeter 09:23 – Testing Running Pressures with a Manometer 10:49 – Target Pressures and Operational Sequence Chart 14:07 – Transducer Redesign & Final Recommendations
