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    austinamanauser's Avatar
    austinamanauser Posts: 4, Reputation: 1
    New Member
     
    #1

    Dec 13, 2007, 09:54 AM
    ? Safe to bypass vacuum switch to test furnace ignition?
    I have two Amana 80 SSE IIO units. One just stopped igniting.

    The trouble indicator light was blinking 2x to indicate the vacuum switch was stuck closed. I made sure the tube was clear, and applied suction to the tube to and could hear the switch activate. The trouble light shows clear now.

    I hear the vacuum switch click on when the induction fan starts blowing. I also hear a series of clicks from the control board (White rogers 50A51-225) but no burner ignition.

    Is it safe to TEMPORARILY bypass the vacuum switch with manual switch to test and see if the burner ignites?

    Should I locate and clean the control rod/tube?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Dec 13, 2007, 12:54 PM
    Disconnect wires from vacuum switch. Use OHM meter to measure across switch as you apply vacuum. Now remember exactly where you took the wires off. Report back after you test it.
    austinamanauser's Avatar
    austinamanauser Posts: 4, Reputation: 1
    New Member
     
    #3

    Dec 14, 2007, 11:42 AM
    Quote Originally Posted by hvac1000
    Disconnect wires from vacuum switch. Use OHM meter to measure across switch as you apply vacuum. Now remember exactly where you took the wires off. Report back after you test it.
    It looks like the problem is the igniter. It's cracked. I have ordered the replacement part from a local supplier.

    I'll report back to confirm that corrects the problem.

    Thank you for your help.
    austinamanauser's Avatar
    austinamanauser Posts: 4, Reputation: 1
    New Member
     
    #4

    Dec 14, 2007, 11:45 AM
    Quote Originally Posted by austinamanauser
    I have two Amana 80 SSE IIO units. One just stopped igniting.

    The trouble indicator light was blinking 2x to indicate the vacuum switch was stuck closed. I made sure the tube was clear, and applied suction to the tube to and could hear the switch activate. The trouble light shows clear now.

    I hear the vacuum switch click on when the induction fan starts blowing. I also hear a series of clicks from the control board (White rogers 50A51-225) but no burner ignition.

    Is it safe to TEMPORARILY bypass the vacuum switch with manual switch to test and see if the burner ignites?

    Should I locate and clean the control rod/tube?
    It looks like the problem is the igniter. It's cracked. I have ordered the replacement part from a local supplier.

    I'll report back to confirm that corrects the problem.

    Thank you for your help.

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