I have a 10 year old gas water heater. Lately the "hot water" has been only warm, and when I adjust the thermostat on the water heater to "Hotter" the heater does NOT come on until I turn it all the water to the end (where it now reads "Very Hot". ) This is new--in the past when I adjusted the temperature control the heater would fire up...
Question: Do I need a new thermostat AND is this a DIY project... I am pretty handy.