21F Hot water wasn't running, now cold water comes out of warm when
We had 17F at night, I let warm and cold water on dripping. But this morning the hot water wasn't running in the whole house.
I opened all the hot water faucets, when I turn on cold water there is water coming out of the warm water faucet, but it's cold. Are they somehow connected? Why is the water coming out of the hot water faucet only when the cold one is running.
Oh maybe I should mention that I will run cold water upstairs with the hot water turned on, and the water will run downstairs in the kitchen sink and toilet out of the hot water, but only when the cold water upstairs is turned on and vice a versa.