I have a Dometic fridge in my 24ft. Hilo number RM2452. I am in Texas at Paul's RV park brownsville. Here is my problem or may it isn't. The fridge works great on gas but since I'm hooked to electric here I wanted to use the AC selection not gas. I wasn't getting anything when my Master Power Switch was in the top (on) position. So I turned the Fridge to DC power and it is working. Is this the normal when you are attached to electric at the RV park that it should be in the DC position? The book says to select DC and put fridge on #4. Is this the standard number 4 or can you go higher for more cooling? Also should I leave the ventilator fan to the on position as it is running all the time? Is this normal?
This fourm is a great tool. Thanks to all.

Rob,

My first question is have you checked the Fridge AC circuit breaker? [it should be circuit breaker #5 on your AC Panel]. If it has not tripped, there is a ground fault reset on the outlet by the refrigerator. I don't know if that is tied into your refrigerator circuit but you might check it and reset it if it has tripped.

There is an electrical outlet behind the outside cover for the refrigerator. Remove the cover and ensure the refrigerator is plugged into it. If you have a voltmeter with you, you can check to see if AC is present. If you don't have one, take an extension cord and plug it into any outlet that you know is working and unplug the refrigerator from the outside electrical outlet and plug it into the extension cord. If the refrigerator does not work, I would suggest taking it to a repair shop. You may have a defective circuit board.

If plugging it into the extension cord allows you to run it on AC, and if you are familiar with checking AC circuits and circuit breakers and have a volt/ohmeter, you might remove the AC circuit breaker for the fridge and verify that it is not defective.

Hope this helps.

Jerry Curtis
2406 T

My first question is, is there heat coming from the vent outside in back of the fridge? If so, the AC heat element is working. With the outside cover off feel the piping, it should be warm to hot. If you say that it is cooling on DC the cooling unit must be working. And as Jcurtis said, check for AC at the receptacle behind the fridge.

__________________
Great Wife, Joyce
2010 2310H Hi-Lo
2012 F150 4X4 SuperCrew EcoBoost w/Leer Cap
Reese WD Strait-Line Hitch
Amateur Radio K3EXU

All breakers are in the on position. I guess I'm confused with the power settings on this camper. The manual says the master power switch is designed to control 12 volt power to the tralier. When the switch is in the top "on" position power to all lights & 12 volt appliances, there will be no power to the lift motor. When switch is in middle "off" position there will be no power to the lights & 12 volt appliances except 12 volt fridge. When switch is in lower "on" position there will be no power to lights & 12 volt appliances except fridge and lift motor. If this is the case I have to put it in the top position to have lights. It seems like it is designed to run on dc power. I might add that in the DC position on the fridge soda is real cold and working great. I will check the plug to see if there is 120 volts there.

Just checked power to plug outside on fridge and have 120 volts.

With the switch in the UP position, you SHOULD be able to run the fridge on AC power. It may pull more DC power than the converter is able to supply for recharging, if run on DC, so that is not desirable. DC operation is really designed for use during towing.

I've had problems at times getting my fridge to cycle to AC when it detects gas in the lines. I usually have to turn it off and on a few times, with the gas selector in "Auto".

- Jack

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Hi-Lo 1707T
2005 F150 4x4 KR SCrew

I would like to again put it on AC but have a lot of food in there and if it don't work it would take time to cool it back off with DC and I don't have a temp gage to watch it.
Let me ask this, it won't hurt anything for it to run off DC will it?

Understand Jack now what do you mean by gas selector in auto?

I believe your fridge has manual controls and not electronic, so you would not have automatic switching. If you had automatic the fridge would have a push button control panel. It would automatically search for AC, then to gas, and finally to DC.

You could switch to AC for a while with food inside, things stay cold for several hours. As I mentioned before, switch to AC then wait to see if the there is heat being produced, feel on the chimney area because that is where the heating element is located. If you are getting power to the AC outlet there is the possibility that AC element is burned out or the control switch is bad. Locate the wires for the element and unhook them and test with an ohm meter. There should be a reading if it is okay.

__________________
Great Wife, Joyce
2010 2310H Hi-Lo
2012 F150 4X4 SuperCrew EcoBoost w/Leer Cap
Reese WD Strait-Line Hitch
Amateur Radio K3EXU

Switching to AC and will monitor first.
Thanks everbody.