Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>I believe the fan is a reversible one like the heater fans with two
>wires going to it, but could be wrong on a GC. If so, it could short
>and overload or overheat the relay fusing it on.


I kinda doubt fan motor was shorted out if it was running normally
otherwise. Relays do go bad but you cannot make as much mney on labor
changing one of them as a fan. I think he got taken.
-----------------
TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>I believe the fan is a reversible one like the heater fans with two
>wires going to it, but could be wrong on a GC. If so, it could short
>and overload or overheat the relay fusing it on.


I kinda doubt fan motor was shorted out if it was running normally
otherwise. Relays do go bad but you cannot make as much mney on labor
changing one of them as a fan. I think he got taken.
-----------------
TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
wrote:

>I believe the fan is a reversible one like the heater fans with two
>wires going to it, but could be wrong on a GC. If so, it could short
>and overload or overheat the relay fusing it on.


I kinda doubt fan motor was shorted out if it was running normally
otherwise. Relays do go bad but you cannot make as much mney on labor
changing one of them as a fan. I think he got taken.
-----------------
TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

The relays often fail, and seems to me when ours failed with the fan on we
also needed a new fan as the motor was drawing more current then it should.
Bearings probably going out. Our '99 has been in the shop at least 3 times
for this issue. It is not the sensor, but usually the relay, which they get
plenty of lab or for changing as it is behind the headlight and I believe
the bumper fascia needs to be removed. Does not sound like a "rip-off", just
a common expensive Jeep malady.


"SnoMan" <admin@snoman.com> wrote in message
news:eul5g3dpccp7c2sbdebaipvq6jedh7cu00@4ax.com...
> On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>I believe the fan is a reversible one like the heater fans with two
>>wires going to it, but could be wrong on a GC. If so, it could short
>>and overload or overheat the relay fusing it on.
>
>
> I kinda doubt fan motor was shorted out if it was running normally
> otherwise. Relays do go bad but you cannot make as much mney on labor
> changing one of them as a fan. I think he got taken.
> -----------------
> TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

The relays often fail, and seems to me when ours failed with the fan on we
also needed a new fan as the motor was drawing more current then it should.
Bearings probably going out. Our '99 has been in the shop at least 3 times
for this issue. It is not the sensor, but usually the relay, which they get
plenty of lab or for changing as it is behind the headlight and I believe
the bumper fascia needs to be removed. Does not sound like a "rip-off", just
a common expensive Jeep malady.


"SnoMan" <admin@snoman.com> wrote in message
news:eul5g3dpccp7c2sbdebaipvq6jedh7cu00@4ax.com...
> On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>I believe the fan is a reversible one like the heater fans with two
>>wires going to it, but could be wrong on a GC. If so, it could short
>>and overload or overheat the relay fusing it on.
>
>
> I kinda doubt fan motor was shorted out if it was running normally
> otherwise. Relays do go bad but you cannot make as much mney on labor
> changing one of them as a fan. I think he got taken.
> -----------------
> TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

The relays often fail, and seems to me when ours failed with the fan on we
also needed a new fan as the motor was drawing more current then it should.
Bearings probably going out. Our '99 has been in the shop at least 3 times
for this issue. It is not the sensor, but usually the relay, which they get
plenty of lab or for changing as it is behind the headlight and I believe
the bumper fascia needs to be removed. Does not sound like a "rip-off", just
a common expensive Jeep malady.


"SnoMan" <admin@snoman.com> wrote in message
news:eul5g3dpccp7c2sbdebaipvq6jedh7cu00@4ax.com...
> On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>I believe the fan is a reversible one like the heater fans with two
>>wires going to it, but could be wrong on a GC. If so, it could short
>>and overload or overheat the relay fusing it on.
>
>
> I kinda doubt fan motor was shorted out if it was running normally
> otherwise. Relays do go bad but you cannot make as much mney on labor
> changing one of them as a fan. I think he got taken.
> -----------------
> TheSnoMan.com

Re: Re: Grand Cherokee 2001 cooling fan running
 

The relays often fail, and seems to me when ours failed with the fan on we
also needed a new fan as the motor was drawing more current then it should.
Bearings probably going out. Our '99 has been in the shop at least 3 times
for this issue. It is not the sensor, but usually the relay, which they get
plenty of lab or for changing as it is behind the headlight and I believe
the bumper fascia needs to be removed. Does not sound like a "rip-off", just
a common expensive Jeep malady.


"SnoMan" <admin@snoman.com> wrote in message
news:eul5g3dpccp7c2sbdebaipvq6jedh7cu00@4ax.com...
> On Tue, 02 Oct 2007 18:23:57 -0400, Mike Romain <romainm@sympatico.ca>
> wrote:
>
>>I believe the fan is a reversible one like the heater fans with two
>>wires going to it, but could be wrong on a GC. If so, it could short
>>and overload or overheat the relay fusing it on.
>
>
> I kinda doubt fan motor was shorted out if it was running normally
> otherwise. Relays do go bad but you cannot make as much mney on labor
> changing one of them as a fan. I think he got taken.
> -----------------
> TheSnoMan.com

Re: Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 2 Oct 2007 20:00:29 -0400, "doane_nut" <nospam@nospam.com>
wrote:

>The relays often fail, and seems to me when ours failed with the fan on we
>also needed a new fan as the motor was drawing more current then it should.
>Bearings probably going out. Our '99 has been in the shop at least 3 times
>for this issue. It is not the sensor, but usually the relay, which they get
>plenty of lab or for changing as it is behind the headlight and I believe
>the bumper fascia needs to be removed. Does not sound like a "rip-off", just
>a common expensive Jeep malady.


It seems to me that if the relay sticks that easily then it is under
rated for the job and fails with time. Relays can arc a lot under high
current and DC loads and if the contacts are not sized properly for
this load they will fail with time. If this is really such a common
problem, they should have fixed it with a higher capacity relay rather
that keep sticking you with replacing a marginally rated one. I have
had a lot of cars over the years with electric fans and never had the
first one with control relay issues even after 11 years of service.
Properly sized the fuse will blow before the relay would burn and they
fact that no one mentions fuses blowing tends to support a design flaw
with a improperly sized/rated relay. (likley to save a few pennies
when building them)
-----------------
TheSnoMan.com

Re: Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 2 Oct 2007 20:00:29 -0400, "doane_nut" <nospam@nospam.com>
wrote:

>The relays often fail, and seems to me when ours failed with the fan on we
>also needed a new fan as the motor was drawing more current then it should.
>Bearings probably going out. Our '99 has been in the shop at least 3 times
>for this issue. It is not the sensor, but usually the relay, which they get
>plenty of lab or for changing as it is behind the headlight and I believe
>the bumper fascia needs to be removed. Does not sound like a "rip-off", just
>a common expensive Jeep malady.


It seems to me that if the relay sticks that easily then it is under
rated for the job and fails with time. Relays can arc a lot under high
current and DC loads and if the contacts are not sized properly for
this load they will fail with time. If this is really such a common
problem, they should have fixed it with a higher capacity relay rather
that keep sticking you with replacing a marginally rated one. I have
had a lot of cars over the years with electric fans and never had the
first one with control relay issues even after 11 years of service.
Properly sized the fuse will blow before the relay would burn and they
fact that no one mentions fuses blowing tends to support a design flaw
with a improperly sized/rated relay. (likley to save a few pennies
when building them)
-----------------
TheSnoMan.com

Re: Re: Re: Grand Cherokee 2001 cooling fan running
 

On Tue, 2 Oct 2007 20:00:29 -0400, "doane_nut" <nospam@nospam.com>
wrote:

>The relays often fail, and seems to me when ours failed with the fan on we
>also needed a new fan as the motor was drawing more current then it should.
>Bearings probably going out. Our '99 has been in the shop at least 3 times
>for this issue. It is not the sensor, but usually the relay, which they get
>plenty of lab or for changing as it is behind the headlight and I believe
>the bumper fascia needs to be removed. Does not sound like a "rip-off", just
>a common expensive Jeep malady.


It seems to me that if the relay sticks that easily then it is under
rated for the job and fails with time. Relays can arc a lot under high
current and DC loads and if the contacts are not sized properly for
this load they will fail with time. If this is really such a common
problem, they should have fixed it with a higher capacity relay rather
that keep sticking you with replacing a marginally rated one. I have
had a lot of cars over the years with electric fans and never had the
first one with control relay issues even after 11 years of service.
Properly sized the fuse will blow before the relay would burn and they
fact that no one mentions fuses blowing tends to support a design flaw
with a improperly sized/rated relay. (likley to save a few pennies
when building them)
-----------------
TheSnoMan.com