If the fan in your furnace runs continuously or turns off and on too frequently, you may need to adjust or replace the limit switch. Finding the limit switch in a Rheem furnace takes just seconds.
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Remove the top access panel on the front of the Rheem furnace. Hold the sides of the panel while lifting it up and toward you. Set the removed panel aside.
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Examine the exposed furnace components to find the plenum, or main duct junction, on the furnace's upper housing; the plenum is a small metal box that is secured to the top of the furnace cabinet with several sheet metal screws.
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Look for the fan limit switch, which is mounted to the side of the furnace plenum. Look for a flat, round component that is labeled "Fan Limit."
The Drip Cap
- Founded in the mid-1920s by brothers Richard and Donald Rheem, the Rheem Manufacturing Co.
- is a well known producer of residential heating and cooling systems.
- Set the removed panel aside.
- Examine the exposed furnace components to find the plenum, or main duct junction, on the furnace's upper housing; the plenum is a small metal box that is secured to the top of the furnace cabinet with several sheet metal screws.