Arrived at location on 3/30/22 - Claim is that unit controller is freezing up only in steam cycle. Removed left panel of unit and inspected components. No major problems were discovered. Accessed diagnostics bank and recovered zero error messages on display. Operated unit in steam cycle for a full cycle and observed. Unit operated properly and revealed no problems. Operated unit in combination mode and observed. Unit revealed no problems and functioned properly. Contacted manufacturer and left a brief message about unit for further assistance with this intermittent problem. Will wait for contact from manufacturer to determine how to move forward. Unit currently in service.