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What is the make and model of your fridge? Are you plugged into a power source with the shore cord? IF NOT, the battery may be dead and most of these fridges take 12 VDC power to run. IF you have a small digital multimeter we can do some tests and track this down pretty fast. Let me know what you find on the power and we can go from there. R.J.
Even with power available, you should have a battery in the trailer. It functions as a booster with the converter to provide 12 VDC power which most of the appliances need in order to operate properly...........including the LP function on the fridge. Check the DC power AT the battery leads and see if you are getting anything there. And at the rear of the fridge, if you can get to that. Let me know what you find and we can go from there.
Is there any 12 VDC to the rear of the fridge? You have to have that in order to get it to start up on LP mode.
Without a battery, you would have to have good DC voltage coming out of the converter and it may have gone south on you here. Any 12 VDC in the trailer at all?
But what about the 12 VDC? The igniter on the fridge has to have that to operate on LP mode.
The controls on the fridge ALL need 12 VDC power in order to operate. IF you don't have a battery, then you need to have a converter that is working properly to provide that. Do you see the black control box on the rear of the fridge? There HAS to be 12 VDC coming INTO that in order to allow the fridge to operate IN EITHER mode. I suspect you lost the DC power on the converter. Take your meter and set it for "DC VOLTS" and check to see what you have. Let me know...........
The DC circuits have no "plugs".........only wires coming into the rear of the fridge. There is a power block there where they attach with a screw and the wires out of there..........usually a red and a black or white wire go to the control board on the fridge. Without any 12 VDC power this fridge won't operate in any mode. The display on the front won't light up either. I think you need to replace the converter IF all the fuses check out. There is a power fuse ON the control board for both the AC mode and DC power to the board. You might check both of those to be sure one hasn't blown. I am attaching a link to the Dometic Service Manual which covers this model. Print out a copy for your use. Very helpful and it will show you what I have been talking about. I have to leave for a service call, but will check back in later. R.J.