Originally Posted by lwieb
Thanks for all the feedback.
Starting another work week today, but I'll get back to the troubleshooting as soon as I can...
I'll try the upside down bang in case the valve in the tank is the culprit.
Inclined to agree with a bad regulator as both tanks behave the same.
Are they pretty standard? Can I order an RV propane regulator on amazon or do I need to be specific?
I'll get back on in a few days after I've had time to check it out more.
We had lots of issues with our Suburban SF-30 furnace that your problem reminds me of. I replaced my standard issue dual tank regulator with a really nice adjustable one found on Amazon that is made in Italy. It is not 100% plug-n-play, as the bracket is different but the red/ green gauge on it actually works!
So, we love it, in spite of the $50 price, if my memory is correct. I wrote a long posting about my furnace with the phrase "the Agony and the Ecstasy", and I likely mentioned the exact model or Amazon ID number.
Most of the other dual pressure regulators are one size fits all and seem like clones. Camco made the prior one.
The problem with them is that they fail eventually, as they are typically exposed to outside air all the time, and the atmospheric reference pressure port is probably the villain. I'm guessing it rusts up or gunks up. ,That port can be found on the bottom of the main body of the regulator.
We dont use the propane side of our Dometic, but a few years ago, we also modded the main controller board, because we were not happy with the refrigerator temperature, and installed the after market refrigerator controller made by Dinosaur Electronics. Worth every penny just for the adjustable temp setting alone. But at around $100, its cheaper to replace the dual regulator first.
Ive never had to bang on a propane tank; maybe in colder climates thats a good tip, but your symptoms point to a bad regulator or main controller board.
When we had furnace propane problems, the stove would always light even at low pressures, once you bled off any initial air. And, to be 100% accurate, our furnace problem was initially fixed, as detailed in Installment #1, by replacing the regulator, but resurfaced, as detailed in the 2nd Installment, and ultimately turned out to be a much-needed venturi adjustment. Which I described and photographed, and never wish to do again, as long as I live...
Last but not least, I suggest you stand by the outside of the fridge when it tries to fire off. Is it trying to fire off 3 times and then locking out? Remove the white plastic cover ( watch out for wasps) and see if there is a wasp nest or mouse nest or dead frog in there, or anything restricting air flow.
Its easy to replace the regulator, too, and all you need is a small crescent wrench and a screwdriver. In a pinch, you can get one at a Super Walmart.