Sadly, some campgrounds are too noisy for the audible way to work. 

> On Jun 14, 2019, at 10:24 PM, Jim. Felder <jim.felder@GMAIL.COM> wrote:
> 
> As a backup means of determining if the fridge is operating (on flame, which is what the LED will tell you) you can always lay a hand on the outside flue vent. If you listen closely you can tell what cycle the fridge by the sound coming from the flue.
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> Jim
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>> 
>> On Jun 14, 2019 at 4:26 PM,  <David Beierl (mailto:dbeierl@gmail.com)>  wrote:
>> 
>> 
>> 
>>> 
>>> Can I jump on this thread to ask about the LED light near the bottom of
>>> that same panel (on my 87 Westy). I think the light is to indicate that
>>> the fridge is working on gas.
>>> 
>>> Mine has never worked and it would be nice to have. It's hard on the neck
>>> trying to see the flame through the tiny window at the bottom of the
>>> fridge. Does anyone have any thoughts on what the cause and cure might be?
>>> 
>> 
>> Likeliest is black wire in LED panel harness unplugged from single
>> connector in fridge harness. Or wire unplugged from the terminal where the
>> thermocouple screws into the gas valve.
>> 
>> After that likeliest is right-hand chip is bad.
>> 
>> You *cannot* test this with a 1.5V battery. The signal goes negative to
>> chassis ground, and the absolute maximum voltage for the chip negative to
>> the negative supply pin is 350 mV. If you can make a voltage divider
>> limited to say -250 mV max you could use that.
>> 
>> But when in doubt, replace the chip. Chips failing and the power switch
>> coming unsoldered are about all that goes wrong with the board.
>> 
>> Yrs,
>> d
>>