For few hours I had no hot water in the house, but after few hours hot water is coming but only from fawcets, and not from showers or from washing machine.

Are you getting water but its not hot or are you getting no water at all out of the hot side? No water at all would indicate a clog. Do you have a water softener? Is it only hooked up to the hot water? If you take a showerhead off do you get hot water? Probably not. If you take an aerator of a faucet that is working are there orange beads in it?

Chayn's asking for more details and for you to present your complaint more clearly. Is this a pressure problem or a water heating problem? Back to you, Tom.