All of a sudden there is no hot water pressure on any faucets in the house. All cold water faucets have pressure. The hot water heater is a 40 gallon electric.

I just had a similar problem last week. My hot water pressure was extremely low. I posted here and had a few good tips on what to do. It turns out my hot water tank outlet was plugged almost completely. I cut the pipe, and loosened the fitting and had a look. I was amazed to see that the hole was almost completely plugged with rust.

A suggestion that was made, was to flush the water tank. See other replies to this similar questions and that should give you some direction at to where to start looking.I would bet that it is the hot water outlet at the top of the tank is plugged if it gradually stopped running. If it was all of a sudden, the possibly some crud or build up came loose and is now lodge at the outlet.

See Tom( speedball1)... he's the expert here. Good luck.