RV Repair: Norcold Refrigerator problem, pilot flame, dirty vents

Question
We have a 2010 Jayco Jayfeather 23B EXP Trailer. On our first 3 day camping trip of the season, the Norcold refrigerator, model N61X, would not work on the propane setting. It will not ignite on it's own and has to be lit manually. Then it stays on, sometimes for an hour or so, then goes off. In the past, when it was working properly, we would hear the ignitor firing rapidly as it was starting. Now it only clicks once and does not start. We tried it several times to clear out any air that could have gotten into the propane gas supply line. The trailer was level. We were not at a high altitude. The battery was fully charged. The other gas appliances: stove/oven and heater work fine. The refrigerator itself worked fine while the trailer was plugged into the generator on the auto setting and at home plugged into electricity. We recently had a battery disconnect switch installed. Could that have anything to do with our recent troubles? What should we try? Please advise.

Answer
thermal couple may be bad.  That is a copper thing that the pilot flame will actually engulf.  

a vent may be plugged and not allowing the flame to breathe.  Look everywhere for even the most obsecure dirty vents/filters.  

Maybe the ignitor is going bad.