Jeff H Young
In the Trades
David R didnt notice you are a new problem. hope its solved . sometimes confusing when its several people with same or similar issues
The thermostatic valve within the shower cartridge could be faulty. Remove the trim plate and see if the shower valve body has stop valves. If yes close off the cold water. Depending on brand where the cartridge can be removed without destroying it, give it a cleaning and rinse with a little vinegar or replace it............Following this post: when I closed one of the cold lines to a single handle faucet nearest the troubled shower, the troubled shower got very hot for a minute, and then went back to lukewarm.
I systematically closed each of the other cold faucet lines upstairs and downstairs, and with each new closure there was no improvement to the shower water temperature.
Should I disconnect the circulation lines to see if they are the issue?
David
Jeff,David R didnt notice you are a new problem. hope its solved . sometimes confusing when its several people with same or similar issues
Great idea I will try this.Valve crossovers off ,unplug pump. Takes them out of the picture for a test. Then turn them on one at a time.
With both crossovers closed and the circulation pump unplugged, the water heater output temp was 100 degrees.Valve crossovers off ,unplug pump. Takes them out of the picture for a test. Then turn them on one at a time.