Americana and Americana Plus RV Refrigerators - Dometic Corp


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Frequently Asked Questions

Dometic Americana and Americana Plus Refrigerators

Models: RM2351, RM2354, RM2451, RM2454, RM2551, RM2554, DM2652, DM2662, DM2663, DM2852, DM2862, NDM1062

  1. Question: Once I’ve turned my unit on, what’s the next step to get it going?

    Answer: The refrigerator is equipped with an automatic energy selector system. The user turns the refrigerator on and then the refrigerator automatically selects the most suitable energy source available, either 120 VAC or LP gas operation. The system can be set to be fully automatic (AUTO mode is selected) or to operate on LP gas only (AUTO mode is off). On 3-way models, the control system can manually be set to DC mode (DC operation). The DC mode overrides all other operating modes. The refrigerator controls will work down to 9.6 VDC.

    • AUTO MODE - When operating in AUTO - AES/AUTO mode, the AUTO - AES/AUTO mode indicator lamp is illuminated. The control system will automatically select between AC and GAS operation. AC has priority over GAS. Should AC become unavailable, the system automatically switches to GAS. As soon as AC becomes available again, the control will switch back to AC regardless of the status of the GAS operation. If the CHECK indicator lamp is illuminated, the controls have failed to ignite the burner in the GAS mode. To restart an ignition attempt with the CHECK lamp illuminated (or to turn off the CHECK lamp), press the ON/OFF button OFF and back ON again. The control system activates the ignition system and makes three attempts to light the burner for a period of approx. 45 sec. at two-minute intervals. Should 120 VAC become available while the CHECK indicator lamp is on, the CHECK lamp will not turn off until the ON/OFF button is pressed OFF and then ON again.
  2. Question: How do I operate the temperature settings?

    Answer: The RM2354, DM2662, DM2663, DM2862 and NDM1062 thermostat controls both the gas and electric operation, thereby eliminating the necessity of resetting each time a different energy source is employed. After the initial start-up, the thermostat should be adjusted to the desired temperature setting.

  3. Question: What happens to my food if a major component of the unit malfunctions?

    Answer: In the event of a failure of a major operating component, the control system will continue to operate the cooling system. RM2351, RM2451, RM2551, DM2652 and DM2852 If the control cannot read the temperature sensor and control the preset temperature, the control will run the cooling unit continuously at the energy source available. The refrigerator will continue to operate in this mode indefinitely - or - until a new sensor is installed and the system reset. RM2354, RM2454, RM2554, DM2662, DM2663, DM2862 & NDM1062 Two modes of operation can occur:

    • The first limp mode of operation will execute if the display module becomes non-functional. The control system reverts to full automatic operation selecting the best energy source available with AC, DC (3-way only) and GAS priority. The temperature setting is maintained at the mid position. The power module will continually attempt to reestablish operation of the display module.
    • The second limp mode of operation will execute when a failure of the temperature sensing device or associated electronic circuitry occurs. If this should happen, the control system operates on the energy source selected via the control panel. The cooling unit runs continuously on the selected energy source. The refrigerator continues to operate in this mode indefinitely or until a new sensor is installed and the system is reset.
  4. Question: What do I do if my unit has been turned off for a while or I change the LP gas tank and it won’t fire back up?

    Answer: If the refrigerator has not been used for a long time - or - the LP tanks have just been refilled, air may be trapped in the supply lines. To purge the air from the lines, turn the refrigerator off and on by pressing the ON/OFF button. If the flame is not lit within 45 seconds, turn the refrigerator off and back on again. This procedure can be repeated 3 to 4 times. If repeated attempts fail to start the LP gas operation, check to make sure that the LP gas supply tanks are not empty and that all manual shutoff valves in the lines are open.

  5. Question: Is there a quicker way to make ice than just waiting until it happens?

    Answer: Ice cubes can be made in the freezer compartment. For faster ice making, the trays should be placed in direct contact with the bottom of the freezer compartment. RM2351, RM2454, RM2554, DM2662, DM2663, DM2862 & NDM1062 Ice will be made more rapidly if the thermostat is set at its highest position, but be sure to move the thermostat back to normal setting when the ice is formed; the refrigerator might otherwise become too cold.

  6. Question: My food doesn’t seem to stay as cold as it should, what should I do?

    Answer: Cool the refrigerator before placing any food inside. Never put hot food or drinks into the refrigerator - cool them first.

    • The food storage compartment is completely closed and unventilated, which is necessary to maintain the required low temperature for food storage. Consequently, foods having a strong odor or those that absorb odors easily should be covered.
    • Vegetables, salads etc. should be covered to retain their crispness.
    • The coldest positions in the refrigerator are under the cooling fins and at the bottom of the refrigerator. The warmer areas are on the upper door shelves. This should be considered when placing different types of food in the refrigerator.
    • Arrange all food in the unit to allow for free air circulation. Do not over-pack because a stuffed refrigerator must work harder and will have higher cabinet temperatures.
    • Do not leave the unit’s door open any longer than necessary. This will reduce frost formation and increase the efficiency of the refrigerator.
  7. Question: What can I do to reduce frost build-up?

    Answer: The easiest way to prevent frost buildup, which can reduce efficiency, is to wipe excess moisture off items being placed in the compartment.

  8. Question: What’s the best way to defrost my unit?

    1. Shut off the refrigerator by pressing the main power ON/OFF button (OFF position).
    2. Empty the refrigerator.
    3. Leave the cabinet and freezer doors open and place the drip tray under the finned evaporator. Defrosting time can be reduced by filling the ice trays with hot water and placing them in the freezer compartment.


Do not use:

  • A knife or an ice pick, or other sharp tools to remove frost from the freezer shelves. It can create a leak in the ammonia system.
  • A hot air blower. Permanent damage could result from warping the metal or plastic parts.

CAUTION: Never use strong chemicals or abrasives to clean these parts, as the protective surfaces will be damaged.

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