Hot water is not flowing from the ceiling electric hot water system to the whole house. We have blocked the pipes/taps in our bath room to do the renovation. Now when we turn on the hot water taps there is only a small gush of hot water flowing from the bath tub. All the other hot water taps in the house is not running. The cold water taps throughout the house is working as per normal. Would greatly appreciate it if anyone knows how to fix this problem. Thank you in advance.