"John Szydelko" wrote in message
...
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 does is smell like? Does the cat use the litter box?