Just did a service upgrade on my house from 60 amps to 200 amps. Now my water isn't getting as hot as it was before. The water will get warm but not hot enough for a shower or anything like that. I got to check my hot water heater to make sure it still has power (may have a misplaced or loose wire after the service upgrade) but i think it still has power since the water does get warm. Any ideas on what might be the problem?