The answer to 'why is my water heater installation' is that there are several common causes for issues with a water heater installation. These can include improper venting, incorrect tank size, leaks, sediment buildup, and faulty components like the thermostat or heating element. Symptoms may include lukewarm water, strange noises, leaks, or the water heater not turning on at all.
Many water heater installation problems can be addressed through DIY troubleshooting and maintenance, such as flushing the tank, checking connections, or replacing the thermostat. However, more complex issues like venting problems or replacing the entire unit are best handled by a professional plumber to ensure proper and safe installation.