Tip & How-To about Refrigerators

How to troubleshoot and, repair your RV refrigerator

If this is a gas absorption refrigerator make sure it's level while operating.
check for heat at the roof vent if no heat check heating element or, gas burner behind the refrigerator accessible through the refrigerator outside hatch; next: check the relay and, inverter it is located under the refrigerator front if all these things check ok and, especially if you find a yellow power on the gas refrigeration unit the tanks behind the refrigerator box; you must replace the gas refrigeration unit by: removing the refrigerator from the cabinet from the front then lay it down and remove the gas refrigeration unit replace it with a new one but, don't forget to remove the 3' long spiral metal strip from the old gas refrigeration unit exhaust vent and, reinstall it in the new gas refrigeration unit the gas refrigeration units can be purchased online.

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how do I get a operating and trouble shooting manual for a dometic royale rv refrigerator?


Contact the manufacturer, Absorption refrigeration is an infrequently used alternative to compression refrigeration. Absorption refrigerators use a solution of ammonia and water as refrigerant fluid. A gas flame heats the ammonia and provides the energy that drives the cooling process. These models are generally very simple and have few moving parts. This is a very straightforward process. There are three main principles behind proper operation of an absorption refrigerator. Place the refrigerator on a level surface. Make sure that it is adequately ventilated. Check that the correct heat is being applied in the boiler. As long as there are no leaks, this should be enough for the refrigerator to work properly.
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Jun 18, 2016 | Dometic Refrigerators

1 Answer

How do I operate my 1971 rv Dometic RM 36 refrigerator? It works on both gas and electric but I have never used this type of fridge and the people I bought it from said they had never used it.


Your refrigerator is a ammonia unit that boils the ammonia for it cool the box. It has a electric heat element inside the metal box you see when you look at the back of the unit. It is VERY important that you have the unit level in all directions before you use the unit., otherwise you will kill the cooling system.
As far as how to start the system first make sure that both the roof vent and the vent in back are clear. Turn the electric on to the unit and a light should show that the unit is on. turn the thermostat to the coldest setting. In a half a hour the freezer section should start to be cold. If not then you see if the back of the unit is heating up.
If it still cold in the back you should try operating it on gas. just follow the lighting instructions. If it heats up but still does not cool then the cooling is bad. It would be cheaper to by a new unit then fixing the old one.

Nov 11, 2014 | Refrigerators

1 Answer

a whirlpool gas dryer will not heat up


If your dryer is not getting any heat, you need to make sure there is nothing blocking the vent. IE: LINT. Air flow is key to efficient drying. Make sure the dryer settings are appropriate for the clothes you want to dry. The timer selection, fabric selection, and the temperature selection all play important roles in proper dryer operation.
Check the heating element, burner operation, ignitor, thermal fuse, and the wiring (power cord).
• Heating element (For Electric Models)
• Burner operation (For Gas Models)
• Ignitor (For Gas Models)
• Thermal fuse
I WOULD START WITH:
To protect from over-heating, many dryers use what's commonly called a thermal fuse. If the thermal fuse gets too hot, it will blow, and completely shut down your dryer until it is replaced. This fuse is often mounted within the exhaust duct in the back panel. It's about an inch long, and is usually found within a white plastic housing. When fuses blow, it means they have no continuity and no power will flow through it. A bad thermal fuse needs to be replaced. When replacing this fuse, check the dryer vents to make sure there is no lint buildup which can cause the heat to stay trapped and blow the fuse again.
Visually inspect your heating element for any broken or burned areas.Check the coil for continuity with a Volt Ohm Meter. If there's no continuity, it means that the element is bad and you need to replace it.
If the ignitor is cycling without the burner lighting, you probably have defective electrical coils in the gas valve. These coils look like black cylinders with wires coming out the top of them, and are located near the burner valve assembly. When they get power, they open up and allow the gas to get through to the burner. If this is a new installation, make sure the gas valve is turned on.

Sep 28, 2013 | Home

1 Answer

I have a Dometic RM3801 rv fridge that was working fine on 120v and then stopped cooling. All the lights come on but the compressor won't run. It is level and the cooling fins are clean. I checked power at the plug outlet it runs a blow dryer.I am unable to try it on gas at this time. Help!


your refrigerator is an ammonia absorption system it does not have a compressor only a series of closed pipes and small tanks located behind the styrofoam box so; to operate yout refrigerator you need: a propane flame or, a 12 volt heating coil or an AC transformer to heat the system depending on if you have a 1,2,or, 3 way system.
also; these refrigerators will only work if you are on level ground
so check your fuses, transformer and, or, your gas thermocouple:
the thermocouple is a rod that sits in the burner flame to control the gas valve if you see some yellow dust around the back of the refrigerator you have a leak of the sealed system don't buy a new refrigerator just replace the system and, be sure that you remove the twisted metal riser in the top of the refrigerator vent pipe to use in your new system or, nothing will work the ammonia absorption sealed systems can be bought on ebay etc.

Sep 25, 2013 | Refrigerators

1 Answer

will not run only on gas but will not cool


If it works on gas and NOT electricity then the heating element is not getting power or the heating element is open. The heating element is located on the tubing just aft of where the pilot flame is on the bottom of the copper tube. You should check for power to the heating element and with power off perfom a continuity check on the element. I really do not at this time think you have a heating element problem.

There is a 120VAV element a AND a 12VDC element. The chances of both of these failing at the same time is pretty slim.

There is a note in the manual:
If the gas only pushbutton is depressed the
lamp will illuminate green and the refrigerator
will only operate on the LP gas mode, even if q
120 or 12 volts are available.

Another significant change in the third
generation A.E.S. system is how the 12 volt
heating element mode operates. As with the
first and second generation series, the 12 volt
heating element circuit is energized by the
ignition lock terminal. This terminal receives
its DC voltage from a wire that runs from the
run side of the vehicle’s ignition switch to the
refrigerator’s ignition lock terminal. This
allows the 12 volt heating element to be
energized only when the RV is traveling down
the road.
When the ignition lock terminal is energized
by the ignition key, the printed circuit board
must see at least 13.3 volts DC for a period of
40 seconds before the system will activate the
12 volt DC heating element.
If 13.3 volts is not achieved in this time frame,
the electronics will light the LP gas burner and
the refrigerator will operate on the LP gas
mode.
LOWER THAN 13.3 V.D.C. =LP Operation

If the battery voltage remains low after the
delay cycle, the automatic controls will light
the refrigerator on the LP gas mode and stay
on the gas mode until the printed circuit board
sees approximately 13.3 volts DC to the
terminal block.

For proper cooling on the AC mode, the AC
voltage to the refrigerator should not vary
more than 10 percent from the voltage rating
on the heating element. Heating elements used
in Dometic refrigerators could have a rated
voltage of 110 volts, 115 volts or 120 volts AC.
Because of this, the power requirements for
each differently rated heating element will
vary. For example, if a heating element is
rated for 100 volts, the acceptable power range
would be between 99 to 121 volts AC. If an
element is rated for 115 volts, the acceptable
power range would be between 103.5 to 126.5
volts AC. If the heater is rated for 120 volts,
the acceptable AC power range would be
between 108 to 132 volts AC.

The unit to operate on either AC or DC must have 13.3 volts to the unit. I think this is where your problem lies in that the battery voltage is less than 13.3 VDC


If all of that checks good just repsond here and I will help you. There is still more that can be checked.

Thanks for choosing FixYa.

Kelly

Aug 24, 2010 | Dometic RM2652 Refrigerator

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