Turning on the A/C will only cause the fans to run IF the A/C is not low on refrigerent. Not a good test unless you KNOW the A/C is OK. Best test is to just jumper the 2 wires to the otterstadt switch. If the fans won't run with the jumper chances are they won't run with the A/C either. It doesn't always work the other way around because of the low pressure switch on the A/C. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Tom Tait" <TTait@...> wrote: > > Keep in mind your fans will likely turn on when you turn on the AC. It > does increase the load on the engine a bit, and warm the air going > across the radiator a bit too, but the net effect in my experience is > that the volume of moving air still results in net cooling... > > ________________________________ > > From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf > Of Paul J > Sent: Friday, May 11, 2007 5:14 PM > To: dmcnews@xxxxxxxxxxxxxxx > Subject: RE: [DML] Cooling Fans Not Turning On > > > > I had the same problem recently and ended up with the rad cracking and > spiting coolant out. Luckily no damage was done to the engine. > > Im replacing the Rad tomorrow along with the water pump as it was on the > way > out anyway. > > I have also wired up a direct switch so that I can switch the fans on as > and > when I want to in case of any problems. Ive replaced the rear screen > switch > with one of DMCH on off switches and its really useful. > > Also changed the temp sensor so hopefully things will work better now. > > The fans are appearing to kick in at the correct temp now (the rad holds > the > water unless the engine warms up and is revved so I was able to test the > fans carefully) but I don't know if they are going to intermittently > work > and not work. > > Will just keep an eye on things. > > Would anything cause an intermittent fault just to bear in mind. > > Paul J > Belfast > #2493 > > _____ > > From: dmcnews@xxxxxxxxxxxxxxx <mailto:dmcnews%40yahoogroups.com> > [mailto:dmcnews@xxxxxxxxxxxxxxx <mailto:dmcnews%40yahoogroups.com> ] On > Behalf Of > Tom Tait > Sent: 11 May 2007 20:14 > To: dmcnews@xxxxxxxxxxxxxxx <mailto:dmcnews%40yahoogroups.com> > Subject: RE: [DML] Cooling Fans Not Turning On > > In fact, the car need not be running, the key need only be in the run > position as I recall. - makes it much easier to hear the fans come on > too... > > ____________-_________-_________-__ > > From: HYPERLINK > "mailto:dmcnews%40yahoogroups.com"dmcnews@... > [mailto:HYPERLINK > "mailto:dmcnews%40yahoogroups.com"dmcnews@...] On Behalf > Of HYPERLINK "mailto:Soma576%40aol.com"Soma576@... > Sent: Friday, May 11, 2007 8:57 AM > To: HYPERLINK "mailto:dmcnews%40yahoogroups.com"dmcnews@... > Subject: Re: [DML] Cooling Fans Not Turning On > > Hi Glen, > > To test the fans, simply unplug the wires from the otterstat and touch > them together while the car is running. The usual safety rules apply!! > > If they do not come on, check the circuit breaker things in the fuse > compartment. They are side by side, one for each fan, and are white, > IIRC. If they are blown, the fans may be dying. > > Andy > > -----Original Message----- > From: HYPERLINK > "mailto:jedimasterglenn%40comcast.net"jedimasterglenn@... > <mailto:jedimasterg-lenn%40comcast.-net> > > To: HYPERLINK "mailto:dmcnews%40yahoogroups.com"dmcnews@... > <mailto:dmcnews%-40yahoogroups.-com> > Sent: Thu, 10 May 2007 10:22 PM > Subject: [DML] Cooling Fans Not Turning On > > Normally my fans come on right around 210 F. I'm sure both were > working until very recently. Sitting in traffic the other day, I > noticed they didn't switch on. My temp needle isn't going over the > 220 mark, but I'm not sure I trust the reading. I've tried replacing > the otterstat and also upgraded to PJ Grady's "little grey box" fan > relay fix. I let my car idle for about 20 mins after this, temp > needle went to 220 but still no fans. Is there a way to jump the fans > or some test I can do to determine if they're working? > > Thanks, > Glenn > 5391 > > To address comments privately to the moderating team, please address: > HYPERLINK "mailto:moderators%40dmcnews.com"moderators@... > <mailto:moderators%-40dmcnews.-com> > > For more info on the list, tech articles, cars for sale see > www.dmcnews.-com > > To search the archives or view files, log in at > HYPERLINK > "http://groups.yahoo.com/group/dmcnews > <http://groups.yahoo.com/group/dmcnews> > "http://groups.-yahoo.com/-group/dmcne > <http://groups.-yahoo.com/-group/dmcne> > ws > <HYPERLINK > "http://groups.yahoo.com/group/dmcnews > <http://groups.yahoo.com/group/dmcnews> > "http://groups.-yahoo.com/-group/dmcne > <http://groups.-yahoo.com/-group/dmcne> > ws> > > Yahoo! Groups Links > > ____________-_________-_________-_________-_________-_________-_ > AOL now offers free email to everyone. Find out more about what's free > from AOL at AOL.com. > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.467 / Virus Database: 269.6.8/797 - Release Date: > 10/05/2007 > 17:10 > > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.467 / Virus Database: 269.6.8/797 - Release Date: > 10/05/2007 > 17:10 > > > [Non-text portions of this message have been removed] > > > > > > > [Non-text portions of this message have been removed] > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! 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