Everyone has their own area of expertise. Perhaps you can always tell what’s wrong with a recipe and can adjust it to make the food delicious. Maybe you are a whiz at auto repair, and just hearing the sound of the engine can tell you there’s a problem, and maybe even give you a clue about what the problem is.
But most of us aren’t experts at the symptoms a heater exhibits when it’s feeling under the weather. The good news is that you can learn how to spot the signs of heater trouble early, so repairs can be made before major breakdowns occur.