In article , "John Szydelko" wrote:
At night we turn the furnace down to 55 and in the morning turn it back up
to 70. Every morning there is a distinct odor when the furnace first kicks
in. We've cleaned the burners to no avail. This doesn't happen when just
the fan is turned on, only when the burners ignite.
Any ideas?

What sort of odor?

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Regards,
Doug Miller (alphageek-at-milmac-dot-com)