Re: [DML] Cooling Fans Not Turning On
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Re: [DML] Cooling Fans Not Turning On



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 
> 
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