The wax plug will not melt, now what?
A. The water in the dishwasher needs to reach at least 125°F in order to completely melt the plug. If it is not melting, it’s because the water inside the appliance is not getting hot enough. Try running the faucet closest to the dishwasher (presumably the kitchen sink) until the water runs hot, then begin the dishwasher cycle so it fills with hot water from the start. If the problem continues, check your water heater to be sure it is set at the proper temperature.