I've been pleased with an added dashboard switch to manually turn on the cooling fan, when I see that temp needle climb. Scott Maurer (Boise) almost 80K on my "List assisted" 1.9L rebuild... Thanks again to all! ----- Original Message ----- From: Wade Shen <swade@UMIACS.UMD.EDU> To: <vanagon@GERRY.VANAGON.COM> Sent: Wednesday, August 01, 2001 4:12 PM Subject: Cooling Fan Themoswitch Woes
> Allo Mes Amis, > > My '85 westy seems to be running hot these days when I'm stuck in rush hour > traffic or if I let her idle at the curb. It seems strange that the > radiator fan doesn't want to come on until the temp gauge has climbed up to > about 7/8 at which point it cycles on/off at low speed. I don't believe > that I've ever heard it go up to high speed - though the high speed circuit > does work when i short the aproppriate wires. > > I've recently replaced the thermostat and flushed the entire system, but > neither action had any effect. My latest suspect is the fan thermoswitch. > Thus raising the following questions: > > 1) Do these things tend to go bad? > 2) I'm guessing that these things are some sort of bimetalic switches that > rely on heat expansion? > 3) Is there anything particularly bad about shorting the low-speed fan > connection semi-permanently (or at least until I can get around to getting a > new switch)? Particularly, I noticed that the fuel injection system uses a > temp sensor near the water pump. I assume this is to make the mixture > richer when the engine is cold? > 4) Is there any problems associated with using the the thermoswitch from the > 86-91 models which seem to have lower temp ratings? > > thanks, > wade > |
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