Seminoe Joe wrote:
I had installed a piece of window screen in front of the exhaust prevent mud dauber wasps from coming in and building nests. After removing it and trying to water heater again, it fired right up and stay lit. Turns out the window screen was enough deflection/baffle to choke off the oxygen and lead to a build up of exhaust.
We use these --
ScreensThey do a good job without interfering with any burners. They come in many different sizes. We use them on the hot water heater and furnace.
