On Tue, 07 Aug 2012 08:04:34 -0600, David Vickery
<david_vickery@yahoo.com> wrote:

> Your thermocouple sounds fine.  The clicking after the flame goes out is
> the valve closing off the gas, which happens after the flame has goine
> out..  it only takes 1 millivolt to keep that valve open.  The
> thermocouple will put out 30 millivolts if it is very strong.  Mine goes
> down as low as 8 when the fridge is running and it works fine, just a
> weak thermocouple and that doesn't affect cooling.  The lower voltage
> affects the LED not being as bright.

That sounds good.  Thanks for your ideas.

I think what is curious is that a couple of times it lighted normally,
with the flame visible in the window and the LED coming on and the flame
is quiet from the flue.  Both times, the mode changed to not visible in
the window, LED off, rumble from flue.  And, other times when it would
light, it would be in that second mode.  I think the flame is burning in
the wrong place, perhaps the gas pressure is too high?  I made a
manometer, and set the regulator pressure to 11".  But, I keep thinking
about my elevation (6000').  The air pressure is lower on the water
column, so setting to 11" will be lower pressure in the regulator.  Or, is
it independent of elevation?  Anyway, I tried different regulator settings
last time I was messing with that, to no avail.  I think I will try it
again.  I also messed with dial C, the temperature setting, to no avail.
Anyway, this condition of two modes of the flame and the rumble seems
significant to me.

--
==Leonard