We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Restart and runs hot for a couple of minutes and then goes off and shows code. It can help you work out the ideal temperature range for your home, or point to potential heating issues outside of the unit itself. This is especially convenient with young children. If your dial isn’t numbered, test the water temperature with a cooking thermometer or just use your fingers, then adjust it accordingly. Upgrading a standard 5′ x 9′ bathroom to a master suite or an in-home spa may require upgrading to a larger gallon capacity unit, especially if the new bathroom will include a deep soaking tub with a multi-head shower system. Temperature adjustment on a tankless heater is simple. The dial on your gas water heater may not be numbered, which can make finding the perfect temperature a little tricky. Provides 7.4 gallons per minute at a 45° F temperature rise; 4.2 gallons per minute at a 77° F temperature rise. This guide to common water heater problems covers gas and electric models from Rheem, Ruud, and other brands. The temperature can be adjusted up or down by a control on the unit. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/6d\/Adjust-a-Hot-Water-Heater-Step-1.jpg\/v4-460px-Adjust-a-Hot-Water-Heater-Step-1.jpg","bigUrl":"\/images\/thumb\/6\/6d\/Adjust-a-Hot-Water-Heater-Step-1.jpg\/aid9590974-v4-728px-Adjust-a-Hot-Water-Heater-Step-1.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"