Originally Posted by f1100turbo
just out of curiosity check your hw heater by pass valve it may be by passed which will give you cold and or warm water intermittently .
the by pass valve will be behind hw heater and you may have to remove a panel from the inside to access it .
What he said!! Also be careful
but you might go outside and open the
water heater door and then stand back with a rubber glove on
pull the pop off valve located near the top of the tank.
See if you get any water out and see if it is hot.
Caution it might be very hot!
IF your bypass is on or partially on it could cause your problem.
(It might also mean the hot water tank is empty and you should never
turn on a water heater with an empty tank!!)