Question about Dometic Refrigerators

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I have a Dometic 3862. The 120 volt operation works fine, gas ignitor and pilot seem to work, but does not start the burner. It shuts down and goes to the "check" mode on the display.

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  • ppedeferri Sep 08, 2010

    Yes. I took many "on and offs" but it finally started working.

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Start the refrigerator and switch to the GAS mode. Check that the gas flame Is lit and the GAS mode Indicator lamp (C) is on. Close the manual gas shut-off valve at the back of the refrigerator. Wait for one minute. The CHECK indicator lamp (E) should be on and the GAS mode indicator lamp (C) should be off. -------------- When operating in the GAS mode the AUTO mode indicator lamp (D) will be off and the GAS mode indicator lamp (C) will be illuminated. This mode provides LP gas operation only. The control system will activate the ignition system and will attempt to light the burner for a period of approximately 45 seconds. If unsuccessful, the CHECK indicator lamp (E) will illuminate and the GAS mode indicator lamp (C) will turn off. To restart GAS operation, press the main power ON/OFF button (1) to the OFF and then ON position. The control system will attempt a new 45 second ignition sequence. If the refrigerator has not been used for a tong time or the LP tanks have just been refilled, air may. be trapped in the supply lines. To purge the air from the lines may require resetting the main power ON/OFF button (1) three or four 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 all manual shutoff valves in the lines are open. If the problem is still not corrected, contact a service center for assistance. If the control is switched to AC or DC (3-way models only) operation while the CHECK indicator lamp is on, it will function properly, but the CHECK lndicator lamp will not go off until the main power ON/OFF button is pressed to the OFF then ON position. ----------- Check the burner-jet,burner tube ,burner screw and the spark electrode. Try cleaning the burner assembly:--- Unplug the refrigerator power cord from the 120 volt AC outlet. Disconnect or shut off the 12 volt power to the refrigerator. Turn manual shutoff valve to OFF. Remove cover from the bumer housing. Disconnect the wire from the high voltage electrode. Remove the burner mounting screw end remove the burner assembly. Remove the wire and flue baffle from the top of flue tube. Clean the flue from the top using a flue brush. Blowing compressed air into the flue will not properly clean soot and scale out of the flue tube. Replace the flue baffle. Clean burner tube with a brush. Blow out burner with compressed air. Before removing burner jet, clean burner area of soot and scale that fell out of flue tube. Remove the bumer jet. Soak the- jet in wood alcohol and Mow it out with compressed air. Re-install and tighten burner jet NOTE: The color of the flame shall be clear blue over the slots of the burner. Reinstall burner, being careful that the end of the burner fits into the slot on the burner bracket. Check to make sure slots are centered under the flue tube and the thermocouple is positioned properly (tip of thermocouple extends over two slots of burner). Se sure to reconnect the wire to high voltage electrode. Check the electrode for proper location and gap.If still the same problem then burner needs to be replaced. Thanks. Keep updated for any more query. You can rate this solution and show your appreciation

Posted on Sep 02, 2010

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The thermocouple is the pilot's, well, co-pilot! It is the electronic device that senses if the pilot flame is hot enough to sustain burning the gas fuel from the burner. If the thermocouple thinks it's safe, then it keeps open the main gas valve located in the pilot assembly. If the thermocouple does not sense enough heat from the pilot flame (such as when the pilot is out), then the thermocouple shuts off the gas valve to the burners.
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