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Old 07-04-2017, 11:51 AM   #1
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Default Freezer cold/fridge not?

Hi
Wondering if anybody can help with this?
It seems that my fridge/freezer is having an issue?
The freezer is nice and cold.....but the fridge is not cold at all?
I was running it on 12volt thru my series of coach batteries and solar.
Is it just not able to draw enough current?did I not let it run long enough?
Are they two different components?
Any help would be great.
Thank you
Eddie
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Old 07-04-2017, 01:58 PM   #2
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What is the age and model of your fridge?

Our B fridges struggle because the sidewall venting doesn't provide enough vent are over the condenser. Fans in the vent compartment help. Also, some B's vent compartments are not baffled properly. I had to add an inner wall and upper deflector to make my 210 vent meet the Dometic factory vent guidelines. Check the installation instructions for your fridge.

Also, older fridges can struggle due to having been overheated from operating off-level. Nothing can be done about that.

Operating on 12 volts provides less thermal energy to the absorption system than 120 volts or propane. Try running on propane and then 120 volts and compare.

Also, parking with the sun on the fridge side makes the venting less efficient as it fights external heat (the sun) while removing heat.

A fan internal to the fridge helps too.

I have improved my fridge performance by gradually addressing all these issues. It is frustrating and if there was a drop-in model available I would switch to a compressor fridge.
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Old 07-04-2017, 03:43 PM   #3
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Hi
It's a1997 210 I believe.
There is a fan added to aid in the venting.
It's odd that the freezer was cold but fridge not.
It probably does not help that I am in SW Florida in July?
I will try the other two options,and a few other things.
I have been thinking of replacing it with a compressor fridge myself.
Can run it off the batts and inverter when not hooked up.
Thanks for your help.
Happy travels
Eddie
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Old 07-04-2017, 03:46 PM   #4
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By internal fan ,did you mean inside the fridge?
I have read that a fan inside can help?
It has one in the outside compartment to help with venting.
Thanks
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Old 07-04-2017, 03:47 PM   #5
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.

Some people put a battery-operated fan inside the fridge to help with circulation.

Check the baffle between the freezer and the fridge...is it blocked?
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Old 07-04-2017, 04:40 PM   #6
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Quote:
Originally Posted by Eraygunz View Post
By internal fan ,did you mean inside the fridge?
I have read that a fan inside can help?
It has one in the outside compartment to help with venting.
Thanks
Yes, inside the fridge. I have a battery powered one from an RV store.
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Old 07-04-2017, 04:46 PM   #7
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Quote:
Originally Posted by Eraygunz View Post
It's odd that the freezer was cold but fridge not.
It probably does not help that I am in SW Florida in July?
Eddie
That is what typically happens when a fridge starts to struggle. The freezer is first in the circuit to extract cooling from the system. If there is not enough cooling capacity remaining then the refrigerator portion is not able to cool down like it should.
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Old 07-04-2017, 05:03 PM   #8
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Throw a few frozen water bottles in the fridge before you fill the fridge to help it come to temp faster. The 3way fridges are slow to cool.
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Old 07-04-2017, 06:15 PM   #9
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Common wisdom says it takes 24 hours for an absorption fridge to stabilize. Ones in perfect condition do better, but that is the norm.

Get a compressor unit.
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Old 07-04-2017, 09:20 PM   #10
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OP, just to give you a point of reference, we've owned our Class B for 2.5 years, and our second Dometic absorption fridge just died after 20 whole months of occasional operation (the original Dometic never did work properly). Technically this newer one is still under warranty, and already it's a goner, and it was handled with kid gloves while we owned it.

We ran through the sequence of troubleshooting that Dometic publishes, but there was no fix for it, other than replacement of its cooling unit. That manual is available here at this link below (I don't know what your "210" reference means, but this is for Dometic, at least):

http://www.fourwh.com/NewDometicRefrigeratorManual.pdf

Note the caveat on page 24: "A refer that chases the out-side temperature is improperly vented or has a weak cooling unit". That rather vague gem applies to our 20-month-old, at least in part.

The specific problem you mention might be related to hydrogen loss - at least that's the speculation recently over on Air Forums. Hydrogen is the smallest molecule in the universe and it is suspected to diffuse out preferentially through the welds in the cooling unit, leaving an inadequate cooling mixture remaining in the closed system, hence the "weakening". Reportedly, that then impacts the fridge more than the freezer. I don't know if there's any truth to this explanation.

My husband and I are in the process of retrofitting a compressor fridge - no more unreliable absorption units for us! I'll come back to this thread and link my blog post after we get the job done - that explains why we picked the model that we did, now we modified cabinetry to accept it, etc.
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