Why is water temperature gauge not working on a 1992 Ford F-150 replaced the sending unit?

If the water temperature gauge on a 1992 Ford F-150 is not working despite having replaced the sending unit, the issue could be due to a faulty gauge itself or a wiring problem. Check for any damaged or corroded wires connecting the sending unit to the gauge. Additionally, ensure that the new sending unit is compatible and properly installed. A blown fuse in the gauge circuit may also be a potential cause.