Water is not coming from front door dispenser, but ice maker works well

On one severe winter cold night my fridge dispenser door stopped water supply, but ice maker was working. First I disconnected power supply to the fridge then turned off main water supply from the wall to fridge and with wrench set disconnected water supply pipe from wall to fridge while disconnecting the pipe make sure to collect the water from the both end pipes. Then removed the cardboard from the back side of the fridge. I disconnected the blue element (dispenser water) the red element (ice maker). [DOUBLE OUTLET WATER VALVE]. If you would try to pull the pipes white (dispenser water) and black (ice maker) you woudn't succeed because once the the white and black pipes are insereted into the water valve those pipes are clamped tightly in the valve. So I cut off those pipes and removed the old water valve, then I conncected the new water valve first conncected those white and blue elements and inserted the white and black pipes pushed in closed with round plactic caps comes with new one.I reconncected the main water supply pipes from wall to the frige and turned on the water supply from wall and plugged the power supply. First surpisingly I doubted it will work, actullay the water dispnser did'nt work immediately I have to wait 2 to 3 hours of time, in the mean time I checked the pipe connections from the bottom of the front left side door ( if you open the two doors bottom you can see the plastic cover it can be removed by pulling towards and pushing in you can close it back into normal position) which water supply pipe comes through the bottom of the door to water dispenser. I disconnected the connector and pusheed the dispensor several times to flushout any leaky water or air then I reconnected the pipes to the connector. I pushed the dispenser with a cup to dispenser, it started working as it is normally. While I was working my 7 years old son helped me as he always eager to learn and explore things.