50 gallon power vent water heater locked out due to painting that was done in the basement. Water heater turned on and went into a heating cycle after unplugging and plugging it back in. Replaced two carbon, and one owner supplied sediment filter for his reverse osmosis system that was installed in 2006. O rings are worn, and that is a very long lifespan for that kind of system. No warranty or guarantee on filter replacement. Recommend draining the pressure tank down by opening the drinking faucet, then shut it off when the pressure is extremely low. Let the tank refill and build pressure again which can take hours. Check the ice cube tray and sump if necessary too.