Water is warm but not hot enough; Weil-McLain water heater cannot reach set temperature or recovery is very slow.

Safety first: Hot water above 120°F can cause scalding. Adjust temperatures carefully and test at a faucet.

• Check temperature settings: Confirm the boiler DHW setpoint or tank thermostat is set appropriately (often 130–140°F for indirect tanks, with mixing valve protection).
• Inspect mixing valve: If a thermostatic mixing valve is installed, verify its setting and ensure its hot and cold inlets are not reversed or partially closed.
• Check for scale buildup: In hard water areas, internal scaling of the tank coil or heat exchanger can reduce heat transfer. This typically requires professional descaling.
• Verify circulator sizing and operation: Ensure the DHW circulator is running and that its size matches Weil-McLain recommendations for the tank model.