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Thread: Weil-McLain GV-5 Series 1 gas boiler lockout

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    DIY Junior Member daling58's Avatar
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    Default Weil-McLain GV-5 Series 1 gas boiler lockout

    My Weil-McLain GV-5 Series 1 gas boiler stopped working last night. The green power light is on, all other lights are off, no flashing lights. The circulator is really hot.

    I reset it by powering it off and on, it tried the whole cycle once and went back into lockout. The light sequence is: 1. purge on, 2. purge off and ignitor on. 3. igintor off and valve on. 4. valve and flame both on for about a minute. 5. valve and flame both off. 6. purge on for a few seconds. 6. Purge off and all red lights off, only green power light stayed on. What could be the problem?
    Last edited by daling58; 01-23-2013 at 06:39 AM.

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