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    sportscarclinic Posts: 2, Reputation: 1
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    Jan 9, 2012, 01:53 PM
    Rheem Classic 90, inducer runs, but no spark. No codes, ~70v DC at spark generator.
    Pressure switch is closing, I tested it for continuity at the control board. No codes, but FLM light flickers rapidly. Also gas valve does not appear to be opening for pilot--perhaps waiting to detect a spark? Held a grounded lead close to high voltage terminal on spark generator, no spark there either. Multimeter shows about 70v DC across primary AND secondary windings of spark generator while FLM light flickers, less than one volt AC indicated across either winding. Desoldered generator, continuity across primary winding, secondary shows high resistance, but not open.

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