No fridge no furnace

[Scotdark]

I have a 34 fkds ... My furnace,fridge,co sensor,and thermostat stopped... I checked fuses at control panel they are all ok... Everything else works in trailer.. Running of shore power... I was told to check 30a fuse at battery and that'll e problem.. My problem is before I drive 4-5 hours to my trailer, I am having a hard time believing it's just that battery fuse.. Shouldn't the fridge and furnace run off converter and not battery when plugged in to shore power?all other 12v systems work off converter

[Scotdark]

So now I have Been told it probably isn't the 30a fuse ( like I thought ) that there are breakers behind the converter that one of them maybe tripped... Does this sound right? Are there breakers behind converter and if so does one breaker power the fridge furnace co sensor and thermostat... Cause then I would feel ok driving up to trailer and resolve this issue from that information

[ALJO]

That sounds strange "Breakers behind the converter". On the converter panel there are breakers ...Yes.
Just get your manual out from the converter you have and look into the trouble shooting section.

[Scotdark]

i don't feel there are breakers behind he converter I think they are all up front and visible.... The service techs don't really want to help me and when I question them they get frustrated with me... I know the fridge and furnace or on same circuit but the 15 amp fuse is fine... I don't know if e co sensor thermostat fridge and furnace are wired together, and then a connection came apart...but that's what my logic is telling me what happened

[ALJO]

Furnace runs on 12 Volt and will have a fuse; Fridge runs on 120 Volt for refrigeration and will have a breaker and 12 volt for the controls which has a fuse. And they are all at the converter panel.
Is this a new unit? Then I would assume there might be loose connections.
Be sure the switch on the Thermostat is in on position.
Check if you have 12 volt at the furnace connections. And check if you have 110 Volt and 12 Volt if you take the outside cover of the fridge unit where you can check it.

[Scotdark]

I went to trailer today and everything works now...there must be some sort of auto shutoff and reset if propane is low from co sensor... I have to look into this but I am happy everything works again... I will. All dealership tomorrow and see if they know about this auto kill device or maybe I am just slowly crazy,either or I'll post what I learn tomorrow