Identify the equipment
Record model, serial, energy source, approximate age and any service history.
Water leakage changes urgency
Active leakage can damage the building even when the heating function still works.
Do not open fuel or electrical compartments
Internal service belongs with appropriate qualified technicians.
Replacement scope is more than tank price
Connections, venting, electrical, drainage, code updates and access can affect the project.
Safety boundary. General planning information only. Do not open, dismantle or work on hazardous electrical, gas, structural, fire-protection or contaminated-water systems unless you are appropriately qualified and authorized.