Troubleshoot water heater not getting power. Replaced water heater disconnect and whip to water heater. Replaced breaker for water heater When troubleshooting we noticed every breaker had the screws extremely loose. We tightened all the screws for the breakers and the neutrals. The disconnect was melting as well as the wire going to the terminals. Because the screws for the breaker were loose we also replaced the breaker for the water heater to diminish any chances of future failure. Everything tested and working properly.