Fridge...used vs new - Page 3 - Fiberglass RV


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Old 08-25-2015, 06:35 PM   #29
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Jon, you bring to mind a question. With no vents, where does the heat from a dc compressor refrigerator get dumped?

Those of you who have invested in DC compressor fridges; where do they dump the heat? How does it affect the internal temp of the trailer? Is any kind of venting recommended?
Well, since you asked. The Truckfridge (TF130) I bought has the compressor on the upper right rear. The compressor/coil/fan unit is really small, and an amazing piece of kit. But I digress. Yes, it does give off significant heat when operating. This is why it is important to maintain the required installation clearances. It is intended that the air flow under, behind, and over the top exiting the front. And this works well due to the fan and the natural flow of cool-warm air.

I choose a different way due to where I wanted the fridge and its' size (to big for the original location). I have the fridge mounted right under a side window with a filter/grill in the counter top right over the compressor. With the window open and our Fantastic Breeze fan circulating air I have not noticed the refrigerator's heat being an issue.
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Old 08-26-2015, 12:11 PM   #30
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I just found a picture of the compressor unit on a TF130. Impressively compact. The coils are about what I would expect. I think I would find a way of venting it directly to the outside.
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Old 08-26-2015, 12:20 PM   #31
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There is another option worth considering if your fridge is in good shape other that it doesn't work. The Amish built a replacement cooling unit for most RV refrigerators. Their replacement units are much more efficient and build to a much higher standard than the originals. Even if you bought a new fridge it would not be built to the standard of the Amish cooler replacement. The Amish are experts in cooling with propane as that's what they use in their homes.
I also understand that even if you successfully "burp" your fridge you are living on borrowed time.

Dometic Cooling Units (Amish Built Brand-new) - RV Cooling Unit Warehouse
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Old 08-26-2015, 12:35 PM   #32
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There is another option worth considering if your fridge is in good shape other that it doesn't work. The Amish built a replacement cooling unit for most RV refrigerators. Their replacement units are much more efficient and build to a much higher standard than the originals. Even if you bought a new fridge it would not be built to the standard of the Amish cooler replacement. The Amish are experts in cooling with propane as that's what they use in their homes.
I also understand that even if you successfully "burp" your fridge you are living on borrowed time.

Dometic Cooling Units (Amish Built Brand-new) - RV Cooling Unit Warehouse
Interesting. Note, their price is about 6 times the cost of a used fridge. They don't seem to have cooling units for small, older fridges such as RM24, RM211, or RM36. So may not be the answer for the OP.
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Old 08-26-2015, 12:55 PM   #33
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Interesting. Note, their price is about 6 times the cost of a used fridge. They don't seem to have cooling units for small, older fridges such as RM24, RM211, or RM36. So may not be the answer for the OP.
Maybe, maybe not, it's just information. You didn't mention what they cost compared to buying a new fridge. Not everyone is into buying a used fridge.
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Old 08-26-2015, 01:09 PM   #34
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No offence was intended.
I have no idea what a new replacement fridge would cost. I almost never buy new, anything. I have obtained exact replacement models for my trailers, (RM211, and RM36) from free, to $100.
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Old 08-26-2015, 01:17 PM   #35
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I would agree with Tim. A good 12 VDC compressor fridge, with sufficient solar power would be my ideal boondocking fridge.
While that may be ideal set up based on the locations you camp, it may not work for others who camp in different locations & weather conditions.

Here in BC for example it is not common to find power sites in a Provincial park and the sites normally have lots of tree coverage where solar panels are of little use. So having a fridge that is capable of only running on 12V would after a couple of trips be something the purchaser may well regret.

I know I have two camping buddies with pretty new trailers both with what are considered to be 12 V efficient compressor fridges and both struggle to keep the fridge running if camping for more than 2 days on a dark and wet BC camping trip when they need to use a lot of lights and the furnace as well. Yes one of them has gone to a two battery system in an attempt to fix the problem but is still limited to days out before having to find another means such as a generator to power up. Both parties would love to have the ability to run the fridge on propane to avoid the headache of worry about hearing the fridge alarm go off in the middle of the night due to lack of power.

On the other hand if one does most of their camping out in the open skies of the Alberta prairies or in Arizona they would probable be very happy with a new 12V only compressor fridge & a solar power to keep it juiced up.
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Old 08-30-2015, 03:33 PM   #36
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We had a Waeco 35 litre compressor 12 volt fridge in our 37 foot sailboat, which we cruised in for 2 years in Mexico. The heat produced by it was very little and certainly didn't affect our comfort. I would swap the 3 way fridge in our Boler in a heartbeat for an equivalent compressor 12 volt fridge.
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Old 08-30-2015, 03:45 PM   #37
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A propane fridge uses very little propane, no battery.
Unless, of course, it uses 12V for the control circuit.
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Old 08-31-2015, 03:35 PM   #38
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Jennifer.

For boon docking you just can't beat older manual propane refrigerator.

A electrical compressor is going to use a fair amount of power period.

You don't have your year listed in the profile so the following may or may not apply to you.
Older 3 way refrigerators are "manual" and require only propane but newer automatic ones also require 12 volts for the "board" and without 12 volts it will not operate even on propane.

Another option is to get a rebuilt refrigeration part of your current refer if the rest of the refrigerator is in good condition.

But from your post it sounds as if your shopping and the owner is making no promises one way of the other.

So bargain as if it does not work then get it home, clean the gas jet and let it run overnight and see if it works.

If not then do the "burping" routine.

Joe
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Old 08-31-2015, 03:54 PM   #39
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Jennifer.

For boon docking you just can't beat older manual propane refrigerator.

A electrical compressor is going to use a fair amount of power period.

You don't have your year listed in the profile so the following may or may not apply to you.
Older 3 way refrigerators are "manual" and require only propane but newer automatic ones also require 12 volts for the "board" and without 12 volts it will not operate even on propane.

Another option is to get a rebuilt refrigeration part of your current refer if the rest of the refrigerator is in good condition.

But from your post it sounds as if your shopping and the owner is making no promises one way of the other.

So bargain as if it does not work then get it home, clean the gas jet and let it run overnight and see if it works.

If not then do the "burping" routine.

Joe
It's a 1979, and it looks to be orignal or within 5-10 years of being built. It is a 3 way.

Bought it at a price commiserate with a broken fridge, so it's added bonus if it works. I haven't had a chance to burp it.

I tried it on110; any reason to try it on propane instead?

It looks to be in great condition, how would I tell if it was a fix such as a rebuilt refrigeration unit?
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Old 08-31-2015, 04:11 PM   #40
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Jennifer
Sounds like a lightly used camper.
I've read if they set for a long time a sediment builds up and clogs the system. that's the reason for the burping, to break up the clog.
they are alsy sensative to being level both operating or not.

120 volts AC would be ok for testing if you can detect the electrical element heating up. They are more efficient running on propane.

Good luck "burping the baby".
Joe
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Old 09-01-2015, 10:39 AM   #41
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I have a Dometic AM24, which is an old original refrigerator. The PO said the unit did not work on propane, only electric. Knowing how the refrigeration works in these, that made me very suspicious of a couple of items on the propane side. I tried to light it. It would stay lit for a very short time, then go out. This is how a weak thermocouple behaves. I chased around to the RV shops and found a replacement thermocouple ($20). Physically replacing it took an afternoon, but that did the trick. Several other people have pointed out, these refrigerators are very slow compared to the household ones. The "dish of water test" is a good one and will give you an idea of performance.
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Old 09-01-2015, 06:15 PM   #42
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"dish of water test"? Elaborate please.
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