Low temperatures are inherently problematic for auto-changeover regulators, because the switch runs on the difference in propane pressure between the two tanks which occurs when one tank runs empty, and even the full side has low pressure at low temperature so there won't be much difference.
Originally Posted by kmart
There was visible moisture in the regulator that I replaced. I just assumed that the green/red monitor window was separate from the actual propane. That the moisture in the window wasn't a factor.
While the indicator compartment is presumably not filled with propane, my guess is that moisture freezing in there could interfere with switching operation. It seems likely that moisture in the indicator chamber would be the result of condensation from moist air trapped in there, rather than from contamination of the propane.
On a larger trailer I have the only auto-changeover regulator that I have owned (assuming this the orignal, and I don't recall replacing it), which is a Fairview Model GR-9984
; it looks entirely unlike the one illustrated in the Fairview page, but if it is the original it is about 14 years old so I assume that it is the previous version. The current GR-9984 looks like the Escape-supplied original shown by Dave.
Mine was made in India, but I think the location of the factory is nearly irrelevant: although crap can be made in third-world countries more cheaply than it can be made here in the land of high wages, it can
be made anywhere... and good
products can be made anywhere that the manufacturer is willing to demand high quality, follow the processes necessary to produce it, and pay what it takes to reach it. Certainly "made in North America" has never reliably meant "well made", and almost any auto enthusiast is aware of the era in which it quite consistently meant "inferior to anything made in Japan". Every product from Apple Computer is made in China or other Asian countries, and although I'm not a fan those who are would probably react strongly and justifiably to the suggestion that all Apple products must be junk due to their origin.