Method of monitoring a dispensing assembly of a washing machine appliance

A washing machine appliance, comprising:

• a wash tub positioned within a cabinet;
• a wash basket rotatably mounted within the wash tub and defining a wash chamber configured for receiving a load of clothes;
• a dispensing assembly for selectively adding wash fluid to the wash tub, the wash fluid comprising at least one of water or a wash additive;
• a sump positioned proximate a bottom of the wash tub for collecting the wash fluid;
• a conductivity sensor for measuring an electrical conductivity of the wash fluid collected in the wash tub;
• a turbidity sensor for measuring a wash fluid turbidity of the wash fluid collected in the wash tub;
• a pH sensor positioned within the wash fluid;
• and
• a controller operably coupled to the dispensing assembly, the conductivity sensor, and the turbidity sensor, the controller being configured to:
• initiate an operating cycle of the washing machine appliance;
• operate the dispensing assembly to dispense the wash fluid into the wash tub;
• obtain the electrical conductivity of the wash fluid using the conductivity sensor;
• obtain the wash fluid turbidity of the wash fluid using the turbidity sensor;
• obtaining a pH of the wash fluid using the pH sensor;
• identify the wash additive within the wash fluid based at least in part on the electrical conductivity, the wash fluid turbidity, and the pH of the wash fluid;
• determine that the wash additive does not match a target wash additive;
• and
• implement a responsive action in response to determining that the wash additive does not match the target wash additive.