State water heater: condensation or water pooling on top of the heater shortly after startup.

Safety: Water on top of the heater can reach electrical components. Turn off power if present.

• Dry and observe: Wipe the top dry and run the heater. Observe where moisture first appears.
• Check fittings: Tighten hot and cold nipples and T&P valve threads. Use approved pipe sealant if reassembling.
• Condensation: Light condensation at initial startup can be normal, especially with cold inlet water. It should diminish as the tank warms.