Experiencing unexpectedly cold water from your supposed hot water tap can be frustrating and inconvenient. This article delves into common reasons why your water heater might be failing to do its job, including issues with the thermostat, sediment buildup, and pilot light problems. We also provide practical troubleshooting tips and maintenance advice that you can apply to try to resolve these issues on your own. With the right know-how, you can restore your water heater’s performance and enjoy a consistently hot shower or bath.