I called for a service to my freezer because is was leaking water, so there was drain issue, that is what I told them from the start. They sent someone, he removed the cover from back of freezer and seen all the ice, he pulled out his bissell heater and started melting the ice. I thought he was going to do a diagnostic test, but he didn't. I continued to question him about why this keeps happening because it happened once before. He did not have a answer. Its a self defrosting freezer this should not be happening. If this guy was any good at his job he would know that it is something else like maybe a sensor? I don't know, but it's going to build up ice again, so he really did not fix my freezer problem. Next time I will just un-plug my fridge and save myself $189.