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    yodeler Posts: 1, Reputation: 1
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    Dec 22, 2010, 05:29 PM
    Carrier furnace 48ss error 5 innition lock out failure. What can that be.
    Electric ignition sparks on and off for 5 minutes and 5 flashes show up on led indicator. It is a rooftop model on ground level with built in airconditioning system and its OK. Noticed 2 wires talked about earlier to gas valve brown and grey. 8.6 VAC before spark ingition and 28 VAC during ignition. Gas valve the problem and if so why...

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Thk for the reply, I tried connecting a wire from the spark generator post and holding the other end 1/8 inch from the ground. First try a got a short burst of 3 weak sparks. Shut off furnace and re started this time no sparks a all. Checked that there was still voltage going to the SG unit. Guess...

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