Dometic Fridge freezer model RM 7605L not cooling

shadowdancer

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Hello, looking for some advice on this as it was ok last week but now will not cool on any setting, I have tried manually setting to Gas, 12v and 240v mains and have tried on the AES system but no joy. All the indicator lights work on the mode switch and on the thermostat control. Hoping that some of you old camper-van types can come up with a solution, and a simple one, thanks in advance.
 
First and foremost I'd check that you are getting heat from the flue and a lit pilot light when on gas if a telltale is fitted (on any power source there should be heat generated from the flue on gas there is a small burner, on electric heat comes from a element)
If you are getting heat then my usual remedy is to remove the unit and invert it for a couple of hours (absorption fridges sometimes suffer a glitch in the ammonia cycle) And inverting them for a short while can often sort it.

Worth a try at least.... ohhhh bear in mind they can be very picky about being dead level too ;-)
 
Hi, I have an RMD 7665L with similar problem to yours and have tried the following with some success:

1-Check for a good flame, and check for heat coming out of the external vent.
2-If flame is on but medium to small, you ,may have a partially blocked flue, which will need to be cleaned.
3-If flue is OK, and you have a good flame then gently tap the cooling coil unit pipes at the back of the fridge to dislodge any obstruction within the pipe system.
4-If the flue is OK but you have a small flame then you may need to replace the jet and igniter, do not attempt to clean the jet.
5-Check to ensure that the drain hole inside the fridge is clear all the way to the recepticle at the back.
6-If you have access to main hook up, set the fridge to main 240v and check the current draw, should be around 1.2amps, this will confirm that the mains heater element is working.
7-Check that the door seal is OK by trapping a piece of paper in the door, close the door and pull the paper out, if there is some resistance the door seal is working.
8- With all these tests, leave a fridge thermometer inside the fridge to monitor any changes, but dont keep opening the door frequently.

Hope the above helps, failing that you will probably need expert help.

Good luck, Lou:goodluck::goodluck:
 
Fridge jets can be cleaned successfully. However do not use any mechanical method e.g. wire or needle.

Soak the jet in a solvent such as thinners or petrol, then blow it clean using compressed air.

An aerosol duster, garage airline, or 12v tyre pump will do the job.

It is unlikely that the fridge needs inverting. It is much more likely that one of the heat sources has failed.
 
Mine is 2005 so I will have to investigate which problems are affecting it, I`m not too sure which components are which so may have to call in the experts, thanks for all the comments from fellow Wilders.
 
POI Admin said:
Fridge jets can be cleaned successfully. However do not use any mechanical method e.g. wire or needle.

Soak the jet in a solvent such as thinners or petrol, then blow it clean using compressed air.

An aerosol duster, garage airline, or 12v tyre pump will do the job.

It is unlikely that the fridge needs inverting. It is much more likely that one of the heat sources has failed.
Click to expand...

Can you tell me where the jet is located, I have two access panels on the outer wall of my motor home, I can feel heat on a pipe inside where the lower panel is situated but can not see a flame anywhere in that area, thanks for your help.
 
loulou said:
Hi, I have an RMD 7665L with similar problem to yours and have tried the following with some success:

1-Check for a good flame, and check for heat coming out of the external vent.
2-If flame is on but medium to small, you ,may have a partially blocked flue, which will need to be cleaned.
3-If flue is OK, and you have a good flame then gently tap the cooling coil unit pipes at the back of the fridge to dislodge any obstruction within the pipe system.
4-If the flue is OK but you have a small flame then you may need to replace the jet and igniter, do not attempt to clean the jet.
5-Check to ensure that the drain hole inside the fridge is clear all the way to the recepticle at the back.
6-If you have access to main hook up, set the fridge to main 240v and check the current draw, should be around 1.2amps, this will confirm that the mains heater element is working.
7-Check that the door seal is OK by trapping a piece of paper in the door, close the door and pull the paper out, if there is some resistance the door seal is working.
8- With all these tests, leave a fridge thermometer inside the fridge to monitor any changes, but dont keep opening the door frequently.

Hope the above helps, failing that you will probably need expert help.

Good luck, Lou:goodluck::goodluck:
Click to expand...

Can you tell me where the flame is located, is it on the upper part of the unit?
 
mistericeman said:
First and foremost I'd check that you are getting heat from the flue and a lit pilot light when on gas if a telltale is fitted (on any power source there should be heat generated from the flue on gas there is a small burner, on electric heat comes from a element)
If you are getting heat then my usual remedy is to remove the unit and invert it for a couple of hours (absorption fridges sometimes suffer a glitch in the ammonia cycle) And inverting them for a short while can often sort it.

Worth a try at least.... ohhhh bear in mind they can be very picky about being dead level too ;-)
Click to expand...

I have never had any problem with this fridge freezer while the van was in any position before, where exactly is the flue to be found? I am not sure of the layout as I am new to this stuff, thanks for your help, we can always rely on Wilders for assistance.
 
hairydog said:
Remove the bottom vent panel. On the right there is a rectangular metal box that's about 4" wide 1.5" high and 2" deep (from memory) On the top, near the left front, there is a small screw going downwards. Remove that screw and the whole box will pull off. The flame should be visible inside there. There is the thermocouple for the FFD, the igniter and the little slotted burner. The slots in the burner need to be clean and clear.

You can take the burner jet off to clean it, but however you clean it you have to be very careful not to ream the hole any bigger.

When you reassemble, be careful to do all the gas tightness checks if you value your van and your life.
Click to expand...

OK I know the part you are talking about, will check this tomorrow, thanks for your help.
 
When you say "not cooling" do you mean that it isn't cooling at all or that it is cooling just not to as low a temperature as it did before?

Where are you located at the moment? Is the van parked with the fridge towards the sun? These types of fridge do not cope well with hot weather, the current heat wave may well be the cause of your problem.

If this is the case then try parking with the fridge vents in the shade and take off the vent covers to allow greater air flow. If the fridge then gets a little cooler than before you did that then the problem is almost certainly weather related. If this is the case consider fitting cooling fans behind the fridge.

Good luck.
 
KuyaAndAte said:
When you say "not cooling" do you mean that it isn't cooling at all or that it is cooling just not to as low a temperature as it did before?

Where are you located at the moment? Is the van parked with the fridge towards the sun? These types of fridge do not cope well with hot weather, the current heat wave may well be the cause of your problem.

If this is the case then try parking with the fridge vents in the shade and take off the vent covers to allow greater air flow. If the fridge then gets a little cooler than before you did that then the problem is almost certainly weather related. If this is the case consider fitting cooling fans behind the fridge.

Good luck.
Click to expand...

It is not cooling at all and we were in West Scotland where the temps were around 16c daytime, much cooler at night and still no joy with the fridge.
 
hairydog said:
Remove the bottom vent panel. On the right there is a rectangular metal box that's about 4" wide 1.5" high and 2" deep (from memory) On the top, near the left front, there is a small screw going downwards. Remove that screw and the whole box will pull off. The flame should be visible inside there. There is the thermocouple for the FFD, the igniter and the little slotted burner. The slots in the burner need to be clean and clear.

You can take the burner jet off to clean it, but however you clean it you have to be very careful not to ream the hole any bigger.

When you reassemble, be careful to do all the gas tightness checks if you value your van and your life.

However, if it is not working on 12v or mains hookup either, the problem is NOT the gas jet or burner. The three power sources all share the coolant circuit only: it none are working, that must be where the fault is, so don't mess up stuff that is not broken.
Click to expand...
Have checked the gas flame which looks ok and on 240 there is heat in the coils on the upper part of the fridge. I have left the motor home plugged in to the mains at home and after a couple of hours there are signs of cooling which is making slush in the ice cube tray so it is working to some extent, will give it some more time and see what happens, thanks again for your help.
 
Just a wee suggestion, ours is the same model, turned out to be the selector switch. Would have to be manually operated for gas 12 v or 230. Other times would only work on AES. Sometimes it would not work at all.
 
Solution to my problem with the fridge freezer.

shadowdancer said:
Hello, looking for some advice on this as it was ok last week but now will not cool on any setting, I have tried manually setting to Gas, 12v and 240v mains and have tried on the AES system but no joy. All the indicator lights work on the mode switch and on the thermostat control. Hoping that some of you old camper-van types can come up with a solution, and a simple one, thanks in advance.
Click to expand...

Found out a few things that may help others with the same problem. First thing is I was not aware of the time it takes for the fridge to cool while on mains (generator), plugged into my house it worked better so that part was ok. Second thing is the 12volt system does not work till the engine is started, and my main problem was with the the gas flame, having looked in to where the flame was it looked ok but in fact the flame was more like a pilot light. On checking my friend`s fridge I found that his flame made a slight roaring sound and was more intense than mine. Removed the burner assembly and cleaned the flue plus the gas nozzle, now have a working fridge freezer. Great help from the forum in helping me to check for faults, thanks guys.
 
hairydog said:
Remove the bottom vent panel. On the right there is a rectangular metal box that's about 4" wide 1.5" high and 2" deep (from memory) On the top, near the left front, there is a small screw going downwards. Remove that screw and the whole box will pull off. The flame should be visible inside there. There is the thermocouple for the FFD, the igniter and the little slotted burner. The slots in the burner need to be clean and clear.

You can take the burner jet off to clean it, but however you clean it you have to be very careful not to ream the hole any bigger.

When you reassemble, be careful to do all the gas tightness checks if you value your van and your life.

However, if it is not working on 12v or mains hookup either, the problem is NOT the gas jet or burner. The three power sources all share the coolant circuit only: it none are working, that must be where the fault is, so don't mess up stuff that is not broken.
Click to expand...

I was having a quick look at mine yesterday, and noticed the plastic water container was half full, we had a three day stop using gas for the fridge, is this normal and was I ok for me to drain the water off?
Thank for any help guys.
 
bernfin54 said:
I was having a quick look at mine yesterday, and noticed the plastic water container was half full, we had a three day stop using gas for the fridge, is this normal and was I ok for me to drain the water off?
Thank for any help guys.
Click to expand...

I think this is to catch any water that comes from the drain inside the fridge and usually will evaporate due to being mounted on one of the tubes that will heat up during operation.
 
shadowdancer said:
I think this is to catch any water that comes from the drain inside the fridge and usually will evaporate due to being mounted on one of the tubes that will heat up during operation.
Click to expand...
Bang on the money.... your fridge at home does the same thing with the condensation that forms on the plate evaporator at the rear of the inside...
drains down to a small tray on the top of the compressor to be 'boiled' off with the heat from the compressor...
commercial sized units sometimes have a tank with a heater element in it to do the same thing OR sometimes the hot discharge pipe is run through the bottom of it to effect the same.
 
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