I think it mainly senses temp in the vacinity of the fins, and direct contact is not essential. For testing, I just aim a hot air gun or hair dryer at it and see if it turns on the fan.- and if it's working, it'll turn on the fan in a minute that way. I've had the fan come on just from the van sitting in the sun on a very hot day too. ----- Original Message ----- From: "neil N" <musomuso@GMAIL.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Monday, July 14, 2008 11:49 AM Subject: Re: Dometic Thermistor Function?
> 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/ |
Please note - During the past 17 years of operation, several gigabytes of
Vanagon mail messages have been archived. Searching the entire collection
will take up to five minutes to complete. Please be patient!
Return to the archives @ gerry.vanagon.com
The vanagon mailing list archives are copyright (c) 1994-2011, and may not be reproduced without the express written permission of the list administrators. Posting messages to this mailing list grants a license to the mailing list administrators to reproduce the message in a compilation, either printed or electronic. All compilations will be not-for-profit, with any excess proceeds going to the Vanagon mailing list.
Any profits from list compilations go exclusively towards the management and operation of the Vanagon mailing list and vanagon mailing list web site.