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On 17 Nov 2002, at 9:31, Steven Ayres wrote: > Unfortunately a lot of people have replaced their stock exhaust systems with > aftermarket stuff that eliminates the rear exchangers, leaving them closer > to the Type 1 range heat-wise. In those cases the regulators are probably > not doing much at all. One thing that most people don't realize is that the thermostatic valve inside the mixer box just opens the flap once the temp reaches its set point. It does not know whether there is actually a cool air tube connected there or not. So if you leave the cool air tubes off, the thermostatic valve will open and just let the hot air spill outside and be wasted. This also means that the temp inside the mixer box will not get moderated, so sometimes this overheats and pops the thermostat. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/