Help spread the word / share us on your favorite social media networks

Facebook Twitter StumbleUpon Reddit LinkedIn

Results 1 to 4 of 4

Thread: No ignition on Rheem Criterion II

  1. #1
    Join Date
    Feb 2015
    Posts
    2

    Default No ignition on Rheem Criterion II

    I have been troubleshooting the issue on my Rheem Criterion II for awhile and still can't seem to figure out the issue. I even called for a technician to come out but just my luck that when the technician came out my transformer went out. I paid $250 for a replacement but that still didn't fix my problem. The technician play around with the furnace and told me it was my Pressure switch. What he did was he by pass the pressure switch, when called for heat and everything works (Heat came on). From this test he told me that I need to replace my pressure switch. I went to a nearby store and pick up a pressure switch but it still didn't solve the problem. I am hesitance to call the technician out again so I learn a few test on the pressure switch.

    1. I did an ohm test on the pressure: When I called for heat, the inducer fan was running but the pressure switch never change from openline ("0.L" ) to any other values. I also did a manual test, when I sucked on the pressure switch the openline (0.L) changed value right away. This give me indication that the inducer blower is not working properly?

    2. Voltage Test: one lead has 24V while the other have no voltage (this can be caused by the pressure switch stuck in openline)

    I am not sure what else to test. Please help.

    Original Pressure Switch: 42-24064-01 (30" WC PF)
    Replace with: 42-101233-02 (-0.30 PF). I ordered 42-24194-82 but was delivered 42-101233-02, and the technician said it was the same.

    Please help.
    Thank you very much.

  2. #2
    Join Date
    Feb 2012
    Location
    Lala land, OH
    Posts
    238

    Default

    Did you check for an obstruction in the hose?

    If your inducer is not spinning at the correct speed OR you have a obstruction in your combustion path, the switch will not close and allow the furnace to continue ignition. This is a safety switch.

    Check for obstructions in your exhaust, check your inducer bearings and for signs of rust around it. If your furnace has AC and it's a upflow (evaporator above the heat exchanger) then check for leaks or over flows around the drain pan. Any of this can mess up the inducer area.

    Did you or the tech check to see what fault code was logged on the board? 1 LED should be solid on, the yellow should probably be off until it lights.. That is your flame sensor check. If you see it flashing or flickering, clean your flame sensor. The 3rd is your status. Solid on means all is good (in terms of detection) any number of flashes is a fault code, let us know how many). 2 flashes means the pressure switch never closed.


    Your "tech's" lack of troubleshooting is concerning, I would find another tech. If it was a company, I would ask to speak with the manager.

  3. #3
    Join Date
    Feb 2015
    Posts
    2

    Default

    thanks Mr.T

    If you are talking about the hose that connects the Pressure Switch to the Inducer blower then yes I have. I actually replaced the hose since it came with the new pressure switch that I ordered.

    In term of fault code, there were none. I got 2 solid green LED and the yellow is off. Yes I did clean the flame sensor as well.

    "Check for obstructions in your exhaust, check your inducer bearings and for signs of rust around it. If your furnace has AC and it's a upflow (evaporator above the heat exchanger) then check for leaks or over flows around the drain pan. Any of this can mess up the inducer area." I am not sure how to check for this.

    If i can't find a solution to my problem, then yes I will call for another technician.

    Thanks MrT

  4. #4
    Join Date
    Feb 2012
    Location
    Lala land, OH
    Posts
    238

    Default

    What exactly is the problem (in detail)?

    Ignition issues take several attempts before a code is set. It may have not been allowed to go long enough. Also, turning the furnace off/on can clear the codes before you can see them.

Similar Threads

  1. Replacement part of Rheem Super Quiet 80 gas furnace pressure switch?
    By ilovebrownies in forum Heating & Air conditioning
    Replies: 1
    Last Post: 01-12-2017, 10:07 PM
  2. Checking Blower Motor Rheem Criterion II
    By turbogt350 in forum Heating & Air conditioning
    Replies: 0
    Last Post: 06-27-2016, 10:21 AM
  3. Help Needed: 1" Gap with airfilter on Rheem Criterion II
    By admin in forum Heating & Air conditioning
    Replies: 2
    Last Post: 09-20-2015, 04:34 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •