On Wed, 20 Mar 2019 17:10:17 -0700, Mike A Schwab wrote:

On Wednesday, March 20, 2019 at 5:47:52 PM UTC-5, news18 wrote:
On Wed, 20 Mar 2019 13:01:59 -0700, Mike A Schwab wrote:

On Tuesday, March 19, 2019 at 1:17:17 PM UTC-5,
wrote:
A couple of months ago when it was coldest my central heating
stopped igniting. My impression from the sounds it was making was
that the thermocouple was bad or the pilot light that would be
ignited was dirty or some such so that the flame wasn't close enough
to the thermocouple of inform it that there was a real flame there
and turn the full flame on.

The repairman came out and said that the pilot and thermocouple was
OK and changed out the main gas valve. The heater appeared to work
for six weeks and then as the weather got cold again started not
lighting again.

The company sent another repairman out and he said that it was the
main control board and replaced that.

I am now $1,600 into "repairs" and sure enough - the heater isn't
lighting still.

It would appear to me at this time that there is nothing more to
replace but the pilot tube and the thermocouple. So I wonder how to
convince the repairman that there is something wrong with one of
those?

If you have propane tanks then when the temperature gets too cold you
don't get enough propane evaporating from the liquid to run the
furnace.
Be sure when ordering for winter to get a COLD mix. Has a mix of
fuels
with a lower boiling point.

Bigger tank?
At what size tank does that happen?
Add a blanket to your tank?
OTOH, I have actually formed ice on a 9kg LPG tank, once, whilst runnng
a string of tripple ring burners for bush catering.

A small heating pad to warm the propane tank. Or one build for the
purpose.
https://www.powerblanket.com/blog/ho...-propane-tank-
from-freezing/

Hmm, perhaps have it close by the Hot water system where it can absorb
wamth from it. YMMV, but ours are both outside.