

Remove any obstructions (pay extra attention to the vents outside the house and the valve at the top of the heat exchanger).Check if the fins of the heat exchanger have been blocked.It might be because the unit’s fan is not creating enough ventilation. You’ve got nothing to worry about if you see these indications: In the majority of cases, the display will give you an extremely simple code to tell you what’s going on. These units don’t use only flashing LED light sequences, but the furnace can blink a few times with a two-second pause (you’ll find out what these light codes mean below). Rheem furnaces come with an advanced diagnostic display that you can consult, whenever something goes wrong. How Do You Read a Rheem Furnace Error Code? Wondering what your Rheem furnace is trying to tell you? Here is a detailed explanation of all the error codes that might appear on the unit’s display.
