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So, next I did this. Turned off electric to the water heater. Shut off the city water coming in. Figured I could de-pressurize the system and perhaps remove a vapor lock if that is causing this. Turn on a cold water faucet to remove pressure. After running for 30 seconds or so and with a drastically reduced water flow, hot water comes out the cold faucet. Turn on hot water faucet and cold water comes out (not much flow by this point). Turn city water back on, no hot water.


Took my IR thermometer. Pressure relief valve body and anode rod end are both 104F. Aluminum panel is 83F.