ah ok.

The one on the back exterior.

When the fins reach a certain temp, the switch inside (bimetalic strip
I assume) closes and the rear fan comes on.

You might be able to "adjust" the piece of metal that screws to the
fins, to help it contact the fin. You can also put a small dab of
thermal paste between fin and this sensor.

I did the above to mine, and it turns the fan on just fine.

Neil.

On Mon, Jul 14, 2008 at 11:30 AM, Michael Diehr <md03@xochi.com> wrote:
> Perhaps I used the wrong term?  I'm talking about the electrical
> gizmo, about the size of a 4 quarters stacked together, that the
> yellow wire connects to (the yellow wire powers the rear fan on/off).
> It's mounted on my dometic to the top set of fins on the back of the
> unit. It's a bit loose, and I'm wondering if it's important that it
> have a thermal contact with the fin, or if it just measures ambient
> air temp?
>
> On Jul 14, 2008, at 8:49 AM, Roger Sisler wrote:
>
>> That probe needs to be tight against the rear of the aluminum
>> evaporator.
>> Metal to metal contact. There is a channel along the entire length
>> of the
>> evaporator's rear that the probe sticks into. A plastic cord about
>> 1/8 inch
>> in diameter and 4 inches long presses in on top of it to keep it in
>> place.
>> That white cord should still be around. It is probably still in the
>> groove
>> and the probe just slipped out.
>>
>> It measures the temp of the aluminum plate.
>

--
Neil Nicholson '81 JettaWesty "Jaco
http://groups.google.com/group/vanagons-with-vw-inline-4-cylinder-gas-engines
http://web.mac.com/tubaneil
http://tubaneil.googlepages.com/