Had a 50 gallon water tank I replaced, I put in another 50 gallon electric tank. Used the dishwasher and one shower the downstairs water was still hot, but then trying to take a shower upstairs the water started hot but went cold, I am wits end. Is there any water to check for blockage or I forgot to say the pressure does not drop and the water is cold. Should have check this before removing the tank
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