View Poll Results: When boon docking how often do you need to refill propane?
Weekly 1 11.11%
Every other week 3 33.33%
Depends on whether heat is needed 4 44.44%
Lasts all summer - no winter camping 1 11.11%
Voters: 9. You may not vote on this poll

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Old 08-03-2012, 05:25 PM   #21
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The hum is more than likely the 12v circulation fan. That will run on shore and battery power. It will continue to run as long as the temperature is above its threshold (thus 5 minutes after the fridge is off). The tank heaters are thermostatically controlled so those should not be draining the batts. Also, depending on how new the unit is we started wiring a little relay that reads battery voltages. The tank heaters will not even work if you are only on battery power. They will only run if plugged in or there is something charging the batteries (Generator/alternator). Prevents them from draining your batteries all the way.

I can only imagine bad batteries or not fully charged as others have mentioned.
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Old 08-03-2012, 06:05 PM   #22
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Quote:
Originally Posted by bclemens View Post
The tank heaters will not even work if you are only on battery power. They will only run if plugged in or there is something charging the batteries (Generator/alternator). Prevents them from draining your batteries all the way.
This is not true in my Flagstaff. They are 12 volt heaters.

While there are 120 volt only pads, they were not used in trailers (as I understand it). Perhaps the C class motor homes (since they have on board generators) have the AC only ones.

UltraHeat - Tank Heaters
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Old 08-03-2012, 07:19 PM   #23
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Quote:
Originally Posted by herk7769

This is not true in my Flagstaff. They are 12 volt heaters.

While there are 120 volt only pads, they were not used in trailers (as I understand it). Perhaps the C class motor homes (since they have on board generators) have the AC only ones.

UltraHeat - Tank Heaters
You didnt include the text before that. "we add a little relay". Ours are 12v as well. But we had a big customer complain that the tank heaters could drain the batteries if inadvertently left on. So a running change was to add a little relay that prevented the pad heaters to work if the voltages drop too low.
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Old 08-03-2012, 07:28 PM   #24
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Originally Posted by bclemens View Post
You didnt include the text before that. "we add a little relay". Ours are 12v as well. But we had a big customer complain that the tank heaters could drain the batteries if inadvertently left on. So a running change was to add a little relay that prevented the pad heaters to work if the voltages drop too low.
What voltage would that be?
"Non-charging"? (IE 12.7 or so?)
Interesting mod and would be interested in what "little relay" was added; and where.
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Old 08-03-2012, 07:35 PM   #25
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Originally Posted by herk7769

What voltage would that be?
"Non-charging"? (IE 12.7 or so?)
Interesting mod and would be interested in what "little relay" was added; and where.
Yes. Non charging. But that's as far as my knowledge goes. I'll find that out all the details from the engineer. I think it's something in the BIRD, but I'll confirm.
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Old 08-03-2012, 08:06 PM   #26
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The pics of the FR class C indicates 4 doors, or Dometic 1350 refrig. They will have two "computer fans" in that back cooling the condenser from electric or propane ops. All 1350's have it could be up to 6 amp draw but not continuos, just often in the 90F temps most of the country has bout now. That with other normal drains could put the hurt on batteries overnight, 2011 means they aren't new anymore either. My tank heaters are 12 volt also, have bright red light when on though.
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Old 08-03-2012, 08:20 PM   #27
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Wow 6amps for lil computer fans?....
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Old 08-03-2012, 08:55 PM   #28
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Wow 6amps for lil computer fans?....
I think that is when the Climate Control Heater is on.
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Old 08-03-2012, 08:56 PM   #29
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Wow 6amps for lil computer fans?....
Maybe I'm a touch high, 6 months ago this style fridge was a big topic. Lots of people pulled it out to change the fans here's part why

"Hi !

I recently bought a Georgetown 2012 model 378 in spring 2011.

It has a 4 doors Dometic refrigerator.

Model: RM1350WIMSSX
Serie: 10997559
MFG: 958530335

The problem is that the fridge is very noisy when it's hot.
Both fans in the back are working 23 hours on 24.
So, this sound is really unsustainable, especially when the kids are sleeping next to.
My repairer suggested me to shut the fans down because 95% of refrigerators don't even have this.
I don't agree with that because the fridge works well, except for the sound.

I think about 2 problems:
Firstly, the sensors must be defective and too much sensitive to heating, so the fans are working non-stop.

Secondly, the fans are defectives."

The reason is they are not installed correctly for their heat rejection. Fans must run, I have one also. Mine was pulled for the lock never connected at assembly, didn't know about the fans. Alot of guys increased both the efficiency and throughput of the fans to prevent running so much. This fridge is not designed for extended drycamping. Without the fans the fridge don't work. So cut back an amp or two, its still too high with existing fans, the hydraulic system draw alarm draws etc. I searched for the early posts about replacement fans about 1.5 amps each and the existing current monsters but I couldn't find it Oh yes there is no switch for climate control (door edge heating).
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Old 08-04-2012, 08:10 PM   #30
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Quote:
Originally Posted by VinceU View Post
The pics of the FR class C indicates 4 doors, or Dometic 1350 refrig. They will have two "computer fans" in that back cooling the condenser from electric or propane ops. All 1350's have it could be up to 6 amp draw but not continuos, just often in the 90F temps most of the country has bout now. That with other normal drains could put the hurt on batteries overnight, 2011 means they aren't new anymore either. My tank heaters are 12 volt also, have bright red light when on though.
I doubt its the 4 door fridge...we just came out with it and its just starting to hit the field.
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