How many amps does it draw? I once used an axillary battery and it would
be totally drained in 12 hours.

On 6/1/2012 12:27 PM, David Beierl wrote:
> At 12:42 PM 6/1/2012, Jon Durham wrote:
>> The Dometic frig in my 85 Vanagon runs great with gas or AC current but
>> will not cool much with battery current. Why?
>
> Jon, the AC and DC heaters are each rated 85 watts; but because of
> the lower voltage and correspondingly higher current the DC one is
> very subject to problems with connections. Go through the whole
> system (including the top of the fridge, if necessary) with the
> fridge running on DC and measure the voltage drops in millivolts
> across each connection, and between the connection and the wire an
> inch away on each side (use a needle). Anything more than a few
> millivolts (less than five, say) is a reason to clean up the
> connection or re-make the crimp connector onto wire that's been
> carefully scraped shiny-clean. The fuse itself will necessarily have
> a little drop across it, that's how it works. But between the end of
> the fuse and the terminal should be practically nothing. If
> the fridge fuse isn't already that kind, buy some of the
> glass-enclosed ones from Littelfuse that mimic the European
> type. They are much less prone to corrosion than the
> others. Remember that the actual contact point on the fuse holder is
> the edge of the little hole in each springy contact.
>
> It's possible for there to be problems with the heater itself, but
> much less likely. One thing to check, though, would be that it's
> properly inserted and secured in its tube attached to the boiler.
>
> Yours,
> David
>

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