The building manager reported inconsistent heat and cold spots throughout the office. Upon inspection, I found that one of the rooftop units had a faulty thermostat that wasn’t communicating properly with the control board. I verified the issue by checking voltage readings and confirming the unit wasn’t cycling correctly. I replaced the thermostat, reprogrammed the settings, and tested the system to ensure even heat distribution. After verifying airflow and temperature balance throughout the zones, the system is now running efficiently and maintaining proper comfort levels.