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I believe all furnace blower motors are AC induction motors without brushes or the ability to generate interference. I think it's fairly unlikely that the AC motor itself is causing the interference and probably why bypassing its wires made no difference. Most furnace issues are related to the igniter but that would not explain the problem in the AC mode.

[QUOTE="Shockwave, post: 401709, member: 10882"] I believe all furnace blower motors are AC induction motors without brushes or the ability to generate interference. I think it's fairly unlikely that the AC motor itself is causing the interference and probably why bypassing its wires made no difference. Most furnace issues are related to the igniter but that would not explain the problem in the AC mode. [/QUOTE]

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