There's an, "Aquastat " on the water heater, turn it up one increment and see if that helps. The water heater should turn on in under a minute if it's functioning properly.
SOURCE: New water heater, shower hot then only warm water in 5 minutes
try this, set the bottom therostat if it is electric , 10 degrees hoter than the top is set , if gas have no ideas
SOURCE: warm water only
You can eliminate the shower control knob possibility by turning on your hot water anywhere else in the house. If you get hot water in other places, then it could be the knob causing it. A substantial lime buildup in the tank can also cause poor heat transfer from the elements to the water.
SOURCE: Not heating water hot enough or as much water.
You probably have a bad heating element. Probably the upper element.
SOURCE: mouse got into the hot water heater thru the
theoretically possible-----a mouse can get in, but most exhaust fan bearings are permanently sealed and are expected to run perfect for their designed life, without any need for lubrication---if a mouse got in, i can only assume that it was chewed up (or it's **** /urine) and was pulled into the motor/bearing shaft and caused some slow in revolutions due to animal parts grinding in the smooth bearings ---it could happen--it depends on how the bearings are sealed around the exhaust motor shaft....orrr, the mouse was killed by the spinning exhaust fan blade, and then "pasted" to the fan blades(ironically called a squirrel cage) and this caused extra weight and an unbalanced exhaust fan which would rapidly cause wear and burnout of bearings due to tremendous speed of exhaust fan---i have seen many a dead rodent inside "squirrel cages" (furnace and water heater exhaust fans and their housings)...in fact i chose to even scrape some of them out for refurbishment!
SOURCE: Rheem 50 Gal two 4500W heating element - not enough hot water
one element is off peak and one is boost could be thermostat or ripple controller in fuse box or one dead element
Testimonial: "It is very good advice. I bought a tester to check out both upper and lowre thermostat and heating element; I've replaced the lower heating element "
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