On Sat, 17 Jan 2009 18:36:15 -0500, "C.D" wrote:


"Peetie Wheatstraw" wrote in message
.. .
On Fri, 16 Jan 2009 20:34:11 -0500, "C.D" wrote:


"Peetie Wheatstraw" wrote in message
...
On Fri, 16 Jan 2009 09:08:15 -0500, "C.D" wrote:


I measured again last nite. The burners fire, the blower kicks in,
and about 40 seconds later, I get the big POP!

I 'm pretty sure it has to do with increasing temp in the supply
(not return) ducts.

Thx,
Peetie

my furnace does the opposite. i get the loud POP when the blower shuts
off.

Immediatly? Before it's had any time to cool off?

yep.

Even more curious than my little problem.

Hope it doesn't keep you awake at nite.

nah...but now i'm worried about the CO2.

CO2 is carbon dioxide (in which we swim, all our lives).

You are worried about CO (carbon monoxide).

Buy a detector. Not too expensive.