After using only a little water for a bath, the water became only luke
warm. I checked the circuit breaker, it was OK. With the breaker
off, I put an ohm meter on each element. One showed 11.9 ohms, the
other 12.9. I turned the thermostats up from 130-135 to 150 and now
the water is hot. Could one of the elements be burned out, if they
are showing about 12 ohms of resistance?
There are two elements, top and bottom with corresponding thermostat.
The temp is usually set at 145 deg. You checked the element which showed
continuity meaning it is not burned out. You have to check 'stat. Some
times 'stat fails open or shut. For further info. Google how electric
water heater works, etc.
If they both show about the same resistance then it is doubtful they are
burned out. That calculates out to about 4000 watts each. That is normal
for most home water heaters. It may have been a stuck or bad thermostat.
The next time you have a cold water condition measuer the voltage across the
elements and see if they have voltage on them. It is possiable that one of
the elements may be opening up when it gets hot, but I doubt it. A clamp on
ampmeter would tell if the element is bad .
I think we have the same daughter. I used to shut the hot water off
sometimes to get her out. She also had more shampoo and conditioner than we
have nuclear weapons stockpiled. When she finally married and moved, we did
not have to buy any shampoo for a few years.
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