Well figured it out. The cold water supply that runs underneath floor about where tv is was the culprit. Put a heater in the compartment where shower pan is, you can see cold water that feeds to under kitchen sink from tank and I assume also from city water to bathroom. I went out and hooked to city water and turned pump off and I had hot and cold at kitchen sink but only hot in bathroom. So made sense that is where was froze up.
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