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bpu699 bpu699 is offline
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Join Date: Apr 2007
Location: wisconsin
Posts: 2,539
In such a scenario, can the lambda frequency valve be broken? Plugged in or not, this think is buzzing. It seem slike this regulates back pressure on the same circuit as the WUR???

Does removing the valve make a difference? Replacing it? This may help you.

I almost never see any posts on here about this frequency valve, but it must have some kind oif failure mode.

Old 11-18-2014, 04:20 AM
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