A gas unit that quit heating is usually a pilot light out, a failed thermocouple, or a gas valve stuck closed. An electric unit more often means a burned-out heating element or a tripped thermal cutoff. Sediment at the tank bottom is a frequent accomplice either way: it settles into a layer that insulates the burner or element from the water above, so the unit works harder and fails sooner. That buildup often arrives early in the parts of Davie where a household draws from a private well, since well water generally carries more dissolved mineral content.
We check the anode rod on the same visit. Once it is fully consumed, corrosion starts on the tank lining itself, a separate and costlier problem from whichever part first brought the unit to our attention. A popping or rumbling sound points at that same sediment boiling under a layer of scale, worth addressing while it is still a repair rather than a full failure.