I'm remodeling my master bath and the contractor installed a Delta T17292-RB shower assembly with valve body R10000-UNBX. The problem I'm having is I don't have any hot water in the house. I've since had my gas water heater replaced thinking that would solve it but, still no hot water. The tile is up on the shower but not sealed or no glass enclosure yet until Friday the 19th. I'm guessing something went wrong with the valve body installation but can't figure it out and the contractor says he didn't do anything different. Is there something that could have gone wrong in the installation? Please, any input would be helpful. I've been taking cold showers for almost a week now.