Ask Experts Questions for FREE Help !
Ask
    KyJoey's Avatar
    KyJoey Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 18, 2011, 03:35 PM
    Furnace rheem 90 not igniting
    Rheem Imperial 90 Plus not igniting.

    Symptoms – When heat called for: tries to fire. Over and over a click from a module on the control board (ST788C1002). A green flash comes from the module on the control board that is clicking.

    Ignition Control Module – Honeywell 47-22481-01 – does not give any LED indications at all - No blinks at all on the LED on the Ignition Control module.

    Blower working fine.

    Sensor has been cleaned with sandpaper. Ignitor appears to be fine. It was replaced about 3 years ago. Heat Exchanger replaced about 10 years ago – warranty. Burners replaced about 5 years ago. I have photos taken today ready to forward if they will help.
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
    Ultra Member
    		  
    #2

    Nov 18, 2011, 06:47 PM
    Sounds like to me you have a bad hot surface ignitor. If its not glowing and you can see a white ash spot on the ignitor its bad.
    KyJoey's Avatar
    KyJoey Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Dec 3, 2011, 04:50 PM
    It's not the ignitor - I just replaced it with a new one, and same thing as described in original question.

    Any more ideas please?
Not your question? Ask your question View similar questions
 

Add your answer here.


Check out some similar questions!

Thermocoupler rheem furnace RGDG-075 AUER stops igniting [ 0 Answers ]

Have replaced the thermocoupler several times by technician and each time only works briefly. Now I have to replace plumbing for house. Can you help?

Furnace not igniting - Rheem Criterion [ 16 Answers ]

I have a Rheem Criterion furnace, about 10-11 yrs old. It turns on, the blower starts, no ignition. It cycles a few times but no ignition. I replaced the ignition, but nothing. There are no error messages on the board. Anything I can check before calling a technician?

Furnace not igniting. [ 6 Answers ]

Also how does my control board know the difference between Heat Pump or Gas heat? It is no longer a heat pump system as I changed my ac and its just electric.

View more questions Search