The refrigerator LP monitoring system is set up to try to light 3 times. If it doesnt light the first time, it cycles (I think for 30 seconds) and then tries again. If it doesnt light the second time, another delay then the third attempt. If the monitoring circuit doesn't detect a flame on the third try, the refrigerator goes into LP Lockout and must be turned off and then back on before it will attempt another "relight" of the LP system.
The most likely cause of this is that when you store your RV you turn the propane off. It bleeds down and there is air (not propane) in the lines. You can light a stove burner, but that won't bleed air out of the refrigerator line (probably 4-6' of copper pipe. The refer tries to light, no propane, only air, after 3 times it locks out. Solution, stay with the refrigerator until you know the burner is operational, if it locks out, turn the refer off, wait 1 minute, turn it back on. Stand outside with the vent cover off so you can see the flame. Another solution, one probably most people take: Don't turn the propane off unless you're going to store your RV for an extended time. If it's only going to be a week and you'll be back in it, leave the propane on and the lines will stay charged.
As for why it didn't cool on shore power? I don't know, if it was hooked up to 115 VAC, once the LP lockout functioned the reefer should have kicked over to 115 and started cooling. That is, unless you had it in LP instead of automatic. That locks out the 115 operation and relies on LP only, if it couldnt light on LP, then it just shut down. Safety feature...
I'd leave it on automatic, unplug the shore power make sure the LP is working, then plug the trailer back in and let it run on AC power.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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