How to replace a Rheem pressure switch and flame sensor.
Table of Contents
If you have a Rheem furnace that keeps turning off after it runs for a little while you may have a bad pressure switch or flame sensor. This article will go over how to replace a Rheem pressure switch and flame sensor.
The video below will show you how to replace the flame sensor and the inducer pressure switch on a Rheem furnace.
It doesn’t matter if you have a Rheem or Ruud furnace. The brands are basically the same and the process to change them doesn’t vary much.
You can purchase a universal pressure switch and flame sensor or OEM parts. I’ve had good performance from universal parts. In a lot of cases, I have got better performance from universal parts than the original equipment manufacturer parts.
Replacing the Rheem pressure switch.
Step 1. Turn off the power to the furnace.
Step 2. Locate the pressure switch and remove the pressure hose and electrical terminals.
Step 3. Locate the screws that hold the bracket to the frame and remove them.
Step 4. Screw on the new pressure switch in the same location using the same screws. The new pressure switch will come with a new hose. Cut the hose to length and connect it back in the same locations as the old hose. all you will need to do at this point is connect the wires. If the original wires are in good condition with no defects then you can use them.
Replacing the flame sensor
Step 1. Locate the flame sensor and turn the power off to the furnace.
Step 2. disconnect the wire with needle-nose pliers or your hand.
Step 3. Unscrew the screw typically a 1/4″ nut driver.
Step 4. Remove the flame sensor by maneuvering it through the hole.
Step 5. Reverse the process and put the new Rheem flame sensor back in place. Put the screw back in and tighten it. Also, put the wire back on. Ensure it is tight.
At this point, you have replaced the Rheem flame sensor and the inducer motor flame switch and are ready to turn on the power and test the furnace.
Test Rheem furnace
Turn the power switch back on and test the furnace. Set the furnace to the heating mode and turn the heat temperature up. Make sure the Rheem furnace stays on and doesn’t cycle off.