canard writes:

From past experience, it is the burners that are dirty. Just turn the
furnace off (electrically with the switch on the wall and put the gaz
knob to off and of course put the thermostat at the lowest
setting. Get a good light and a few basic tools and remove the burners
and vacuum them ir even better use a copper brush at the end of a
drill to clean all the burner's openings well. Replace, put the bottom
door back if you removed it (to push on the safety stop switch), put
on pilot, relight with a barbecue lighter, count to 100 and keep your
finger on the pilot buttin, when lit put on ON and then put your
thermostat higher and then listen and it should not bang anymore. If
it does clean the pilot as outlet and you can even try this first but
if you pilot flame is good it should not be the problem.

Okay you win today's prize.

You may or may not know this, but most of the posts on homeowners hub
are actually from Usenet.

On Usenet, we don't see old posts, only the most recent posts and replies.
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--
Dan Espen