Hot water will only come out of one of my faucets for a few seconds then it goes to cold. All the other ones work perfectly fine. Does it have to do with the water heater of with a other broken part?

Hi mcksch15 and welcome to The Plumbing Page at AMHD.com.

does it have to do with the water heater of with a other broken part? What broken pipe? Please explain.
On what fixture is this faucet on? Do you have a hot water recirculating system? Is this faucet temperature controlled such as a tub faucet? Can you furnish more details? Back to you, Tom