If your dishwasher isn’t working properly, it can be frustrating. You might not be able to figure out what’s wrong, or you might not have the time or knowledge to fix it yourself. Either way, it’s important to know when to call in a professional appliance repair service. Here are four signs that it’s time to consult a professional. 1. The dishwasher isn’t draining properly. If water is pooling at the bottom of your dishwasher, it’s a sure sign that there’s a problem.