Pressure sensing assembly for a dishwasher appliance

A dishwasher appliance defining a vertical direction, a lateral direction, and a transverse direction, the dishwasher appliance comprising:

• a wash tub that defines a wash chamber and a sump for collecting wash fluid;
• a pump assembly for selectively urging a flow of the wash fluid from the sump;
• a pressure sensor for monitoring a wash fluid level within the wash tub;
• a microphone for monitoring sound generated during operation of the dishwasher appliance;
• and
• a controller in operative communication with the pump assembly and the microphone, the controller being configured to:
• obtain a pressure reading using the pressure sensor;
• determine that the wash fluid in the sump is at a low level based at least in part on the pressure reading;
• energize the pump assembly to circulate the wash fluid;
• obtain a sound signal generated during energization of the pump assembly using the microphone;
• determine that the wash fluid in the sump is not at a low level based at least in part on the sound signal;
• and
• provide a user notification that the pressure sensor is defective.