On Feb 11, 2:51 pm, Della T wrote:
I just bought a CO detector, and wanted to try it on everything that
burns. Neither my stove-top burners nor my oven produced any measurable
CO. This made me a little suspicious until I tried my separate broiler.
The reading on the meter reached 100 ppm within 45 minutes. Yes, I
had thoroughly vented the house since testing the oven. The reading was
confirmed by a second measurement a day later.

So I thought I could just adjust the oxygen mixture by opening the
window on the gas line to the broiler. CO is the result of a rich
mixture (not enough oxygen), right? But the window was already open all
the way. So I thought I might as well try closing it down. This time
the measurement reached 100 ppm even faster - about 30 minutes. I don't
know if that time difference is scientifically significant; I didn't
want to continue or repeat the experiment.

Is there anything other than the mixture adjustment that I should look
at? Or is the burner damaged beyond repair? It does make a little
sense that a burner that sits ABOVE the flame could be damaged, but I
don't know if that would create CO.

Thanks,
Della

As Uncle Vernal used to say, 'If you can't lower the river, raise the
bridge.' So to change your combustion ratio with a fixed air inlet,
lower the gas flow. On some burner outlets, this can be adjusted by
rotating the output nozzle. If the nozzle has a hex base this will fit
a standard box wrench and turning a small amount clockwise will reduce
gas flow. You may need some expert help on this, so check with
repairclinic.com as one source.
Your gas service may have higher than average pressure, and ranges are
often equipped with an adjustable regulator to deal with problems of
that kind. You gas supplier may be able to help in that case...give
them a call. Good luck.

Joe