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    Repoors's Avatar
    Repoors Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 8, 2010, 09:32 PM
    Intermittent ignition on gas furnace
    Gas furnace is running hot/cold intermittently. I had 4 repairmen whohave failed to find the problem. A new ignitor module did nothing. Cold air will blow nonstop with no flame being ignited. All of sudden it will spark and ignite then run normal for a period. All electronics check out good when running with heat. Have not been able to catch it malfunctioning.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 8, 2010, 10:34 PM
    It is very hard to tell what the problem could be with a NO NAME and NO EXACT MODEL NUMBER unit since there has been 5,327 different units built since 1970 or so.
    Repoors's Avatar
    Repoors Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Jan 8, 2010, 10:47 PM
    Quote Originally Posted by hvac1000 View Post
    It is very hard to tell what the problem could be with a NO NAME and NO EXACT MODEL NUMBER unit since there has been 5,327 different units built since 1970 or so.
    Sorry: It is a Central Environmental Systems gas furnace no longer
    Manufactured. It is over 15 years old Model P-HCD16N08201A.
    It uses a Honeywell universal spark ignitor module with 2 relays and Honeywell fan limiter switch.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
    Uber Member
    		  
    #4

    Jan 8, 2010, 11:13 PM

    Can you do another few favors.

    Post the honeywell p/n and the link to the module instructions if you can.

    Post a picture of the pilot area using go advanced/manage attachments.
    Repoors's Avatar
    Repoors Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Jan 9, 2010, 07:46 PM
    The ignitor module is a Honeywell S8610U. When the gas fails to ignite. The module blinks a code
    6+2 (5 minute delay then it will retry ). When the flame ignites it burns strong blue. Very clean.
    The furnace is in a crawl space making photos difficult. Ignitor manual customer.honeywell.com/Techlit/Pdf/68-0000s/68-0135.pdf
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