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Old 07-23-2012, 03:39 PM   #1
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Battery gone in 36h, where to start?

Note I read this here: The RV Battery Charging Puzzle HandyBob's Blog just not sure where to start at all

Thursday night plugged the trailer into shore power at home. Fri around 5pm disconnected and it showed a full charge (4 lights). Note I might have looked while it was still connected. Looks like it might always show 4 lights when it is charging.

Towed the trailer 100 mi for an two night, no hookup stay. Very light use of lights, pump, ran the furnace maybe 5 minutes in the morning. We were literally out all day and didn't spend much time in the trailer.

Sat 10pm we were out out. Lights dim, pump erratic.

I have a 2012 Surveyor Sport 189 with two 70AH batteries. Where do I start, with a battery monitor?
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Old 07-23-2012, 03:42 PM   #2
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Battery draws
Fridge
Hw heater
Radio even when off
Co2 detector
Furnace is a big draw even when on shortly.
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Old 07-23-2012, 03:55 PM   #3
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i had a similar problem started by a dead battery (long story) replaced said dead battery all was good for 2 days, end of 2nd day after traveling all day battery was dead, found that first dead battery took out the fuse from the T.V. no charging when hooked up. check obvious first, plug in to T.V. see if you have power,the fridge will drain battery in about 6-8 hours, if not check fuses in TV and hitch wiring. if you do have good power the battery may have a bad cell. a volt meter hooked to battery and turn on a light if battery shows good voltage with out light then drops to 10 volts or less with light you have a dead cell.
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Old 07-23-2012, 04:34 PM   #4
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36 hours is a bit short for a 140 hour battery bank.

In your fridge there is a "defroster" switch in the door. It runs on 12 VDC.
If you forget to turn it off you will be quite lucky even with battery conservation to get 36 hours (it is a heating element). Check that.

Holding Tank heaters are also 12 volts.
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Old 07-24-2012, 12:48 AM   #5
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I have a DM2652RBX. Looked at the manual, don't have the switch or could not find it. Sent e-mail to dometic support.

Thanks for the pointers.
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Old 07-24-2012, 06:55 AM   #6
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Quote:
Originally Posted by Skelshy View Post
I have a DM2652RBX. Looked at the manual, don't have the switch or could not find it. Sent e-mail to dometic support.

Thanks for the pointers.
Look at page 7 part number 66

Also look at page 11 of your manual under CLIMATE CONTROL and the CAUTION about battery usage and the climate control switch.
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Old 07-24-2012, 07:33 AM   #7
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Quote:
Originally Posted by herk7769

Look at page 7 part number 66

Also look at page 11 of your manual under CLIMATE CONTROL and the CAUTION about battery usage and the climate control switch.
Lou,
Could you take a pic of your switch and post? That might help.
Or does your unit not have one?
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Old 07-24-2012, 08:07 AM   #8
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Originally Posted by f1100turbo View Post
Lou,
Could you take a pic of your switch and post? That might help.
Or does your unit not have one?
Not today, but I will (I do have it).
Once you see it you will be shocked at how you could possibly missed it.
If it were a snake...
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Old 07-24-2012, 08:25 AM   #9
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Quote:
Originally Posted by herk7769

Not today, but I will (I do have it).
Once you see it you will be shocked at how you could possibly missed it.
If it were a snake...
Gee where have I heard that before?
For sure didn't come out the mouth of the dw.
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Old 07-24-2012, 08:27 AM   #10
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Here's my switch. It's located under top edge of the freezer door opening.
When my refer was new they had failed to properly snap the top trim onto
the freezer door. This trim stuck up 1/8" and it would just rub that
tiny rocker switch when you open/shut the freezer.
After a few openings it would move the switch to a "middle" position where
it was on!
Finally the trim popped all the way off and when I re-applied it I discovered
it snapped further down and solved the problem.

You don't want this switch to be on when on battery power!
WHY in the world they made it 12v I'll never understand.
It should have been a 120v heater and only able to be used when on
AC operation.
Who cares about a little condensation when they're on battery power?

The switch is easy to miss. My refer is mounted low so the switch is
below eye level. I can't see the switch standing upright just
casually looking at the refer.
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