How do you adjust a Rheem tankless water heater?

Turn on the remote control. Turn off the gas and water to the water heater by closing the shut-off valves. Press the DOWN adjustment button repeatedly until 100°F (38°C) or 85°F (29°C) shows in the LED display. Hold the DOWN button until the number on the display starts to blink.Click to see full answer. Likewise, people ask, how do I reset my Rheem tankless water heater? Here how to do it right: Begin with turning the hot water tap off. Take the remote control and turn it off as well. Now it’s time to wait. 5 minutes or so should be enough in most cases. Continue with turning the tankless water heater back on. Open the hot water faucet and see what’s happening. Similarly, how do you adjust the temperature on a water heater? Method 2 Adjusting an Electric Water Heater Shut off the power to the water heater. Remove the access panel from the side of the unit. Pull out or push aside the insulation covering the thermostat. Use a flat-blade screwdriver to raise or lower the temperature setting. Replace the insulation and access panel. Secondly, how do you fix code 11 on a Rheem tankless water heater? Rheem fault code 11 – No ignition. Check to make sure there is gas to the unit and that the pressure is correct. Ensure the ignitor is operational before calling for service. Rheem fault code 16 – This is an over temperature warning which could indicate a possible clogged heat exchanger.Why does my tankless water heater go cold?Another problem that tankless water heaters can run into is that of a cold water sandwich—a plumbing term given to sudden temperature fluctuations, when your tankless water heater produces hot and cold water intermittently. This can be caused by: A dirty water filter on the cold water inlet.