I have a different thread going that addressed my issue of 240v power connection. I have everything corrected now but need help with my Refrigerator. I know I have good power to the fridge receptacle, but the fridge is giving me an error code E3. I get the code regardless if I try LP or 120v. The make is Dometic and the model is RM1350SLMX. I googled E3 code and it talks about a recent button, but I don’t believe this fridge has the reset button I read about. Any ideas how to clear the E3 code or is my circuit board toast?

Disconect 12v power to the board to reset

You are confusing having 120 volts with refer operation. ALL 120 volts does for the refer is power the 120 element when on 120. So, you connected to 220 volts. THAT usually blows the 120 element FUSE on the Refer control board and sometimes burns out the 120 element. It takes just 12 volts to operate the refer controls. You have that since the refer powers up. The ONLY reset button is on the outside burner flue cover and IF that button trips, you will have NO power to the refer at all to power the refer controls. Check the fuses on the rear refer control board. Rarely does a 220 hit destroy the Refer board on a Dometic. Doug

So I’ve disconnected 120v AC power to the trailer and have only 12v power feeding the trailer. I tried disconnecting 12v power for a few minutes but as soon as I restore 12v power I immediately get the E3 error code. I only know of two fuses on the 12v side. One inline 4 amp and one mini 5 amp in the circuit board. Both fuses test good. I know I have 12 volts feeding the control board, I know the fuses are good, but still get the E3 code. I don’t see any type of reset button and since I have the display reading E3 and 12v power to the circuit board, I don’t think a reset button, (if there was one) is my problem. Unless someone can steer me in another direction, or tell me something different to check, I think my next move is to spend the $200 and buy a new circuit board. Thanks for the suggestions and if anyone has any more, I surely welcome them.

Did you check the GLASS fuse on the board? That is the 120 element fuse.It is 5 amp. I have never seen the E3 code but the manual states cooling unit problem which is a catch all for any problem causing lack of cooling. There is nothing on a Dometic that could tell you, you have a bad cooling unit. DougPS did you try this?To preform a diagnostics test: 1) Turn off the refrigerator with the ON/OFF button. 2) Press and hold the TEMP.SET button, then press the ON/OFF button. 3) Release the TEMP.SET button. Each subsequent press or the TEMP.SET button will toggle through the list of functions in the table below:

I’d still find the hi limit reset switch located on the stack for the burner and electric heating element and press it to reset the hi limit switch

Dometic Refrigerator E3 code | Good Sam Community

dougrainer
Nomad
May 05, 2019
Did you check the GLASS fuse on the board? That is the 120 element fuse.
It is 5 amp. I have never seen the E3 code but the manual states cooling unit problem which is a catch all for any problem causing lack of cooling. There is nothing on a Dometic that could tell you, you have a bad cooling unit. Doug

PS did you try this?

To preform a diagnostics test:
1) Turn off the refrigerator with the ON/OFF button.
2) Press and hold the TEMP.SET button, then press the ON/OFF button.
3) Release the TEMP.SET button. Each subsequent press or the TEMP.SET button will toggle through the list of functions in the table below:
mxdad777
Explorer
May 05, 2019
So I’ve disconnected 120v AC power to the trailer and have only 12v power feeding the trailer. I tried disconnecting 12v power for a few minutes but as soon as I restore 12v power I immediately get the E3 error code. I only know of two fuses on the 12v side. One inline 4 amp and one mini 5 amp in the circuit board. Both fuses test good. I know I have 12 volts feeding the control board, I know the fuses are good, but still get the E3 code. I don’t see any type of reset button and since I have the display reading E3 and 12v power to the circuit board, I don’t think a reset button, (if there was one) is my problem. Unless someone can steer me in another direction, or tell me something different to check, I think my next move is to spend the $200 and buy a new circuit board. Thanks for the suggestions and if anyone has any more, I surely welcome them.
dougrainer
Nomad
May 05, 2019
You are confusing having 120 volts with refer operation. ALL 120 volts does for the refer is power the 120 element when on 120. So, you connected to 220 volts. THAT usually blows the 120 element FUSE on the Refer control board and sometimes burns out the 120 element. It takes just 12 volts to operate the refer controls. You have that since the refer powers up. The ONLY reset button is on the outside burner flue cover and IF that button trips, you will have NO power to the refer at all to power the refer controls. Check the fuses on the rear refer control board. Rarely does a 220 hit destroy the Refer board on a Dometic. Doug
starcraft69
Explorer
May 05, 2019
Disconect 12v power to the board to reset

Forum Discussion

Dometic Refrigerator E3 code

About Technical Issues

Related Content

Dometic refrigerator

Dometic Refrigerator

Refrigerator quit working

dometic error codes

Dometic e1 code