Hi, I’m getting sudden bursts of very hot water in the middle of a shower. I have a gas water heater. The pilot light is on. Any ideas why this is happening?
This can be an unsafe situation to have a sudden burst of very hot water in the middle of a shower, and you need to have a licensed and insured master plumber check this out as soon as possible.
The water heater has nothing to do with the supply of uneven water temps. It will gradually decrease in temp as the tank begins to run out of water.
In the shower valve is a device that controls the water temp by mixing the cold with the hot to deliver a constant temp that is set by the handle. If that temp goes up and down it's the faucet control that is starting to fail. With modern anti-scald valves this device is set when installed to prevent super hot water from ever exiting the shower or tub faucet.