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I agree, as I think that there should be some resistance indicated at a typical "room temperature". John John McMahon Abilene, Texas ----- Original Message ----- From: "Will McCreight" <whmcc@attglobal.net> To: <type3@vwtype3.org> Sent: Saturday, March 25, 2006 11:32 PM Subject: [T3] T3 Thermoswitch testing > Am in process of treating a sick 1970 squareback, and while testing the > thermoswitch which activates the cold start injector under cold > conditions during starting, I thought I had a bad thermoswitch, based > upon an "open" or infinite ohms reading at room temp when testing > between the lead connector and the body of the sensor. > > After reading many posts here on vwtype3.org (thanx to all of you for > feeding my brain), the thought struck me that instead of heating this > sensor, I should put it in the FREEZER! > > Sure enough, when I test it right out of the freezer, it reads about 1.1 > to 2.0 ohms, and then rapidly warms enough to go to infinite ohms, > "opening" the connection. > > I think this is proper behavior for this sensor, based upon its purpose, > to allow current flow at cold temps but not warm, but I would appreciate > confirmation of this, as I am a "newbie". > > I went to a shop today to replace the sensor, thinking it faulty at room > temp, only to find that the shop owner thought his sensor was bad > also...based upon our shared faulty logic (I now think in retrospect) > that we should be able to measure some level of ohms resistance at room > temp with this sensor, rather than an "open". Before I tell this > skilled and experienced VW-only shop owner about my thoughts on this, > I'd appreciate your thoughts also. > > Will McCreight > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >