Heater Parts question
 

I am replacing the tub on my '83 CJ7 and there is some electronics on the
heater ductwork that I do understand. Just above the vent by the passenger
floorboard there is a three wire plug that goes to a coil inside the
ductwork. Could someone tell me what this is or it's function? Thanks, Dan.

Re: Heater Parts question
 

resister block for fan speeds.

"Dan" <dpete@cox-internet.com> wrote in message
news:d8avf.1708$Dh.634@dukeread04...
>I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks,
> Dan.
>
>

Re: Heater Parts question
 

resister block for fan speeds.

"Dan" <dpete@cox-internet.com> wrote in message
news:d8avf.1708$Dh.634@dukeread04...
>I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks,
> Dan.
>
>

Re: Heater Parts question
 

resister block for fan speeds.

"Dan" <dpete@cox-internet.com> wrote in message
news:d8avf.1708$Dh.634@dukeread04...
>I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks,
> Dan.
>
>

Re: Heater Parts question. Now CJ7 Fan change too.
 

That is the fan speed resistor block.

While you are in there you could convert the heater to a big GM blower
that will defrost 'all' the windows, literally cook your feet and allow
you to drive at -25 with no gloves, boots, ski pants or parka on. All
for about $25.00!

It puts out more on low than the stock one does on high and that is no
exaggeration. It will _even_ de-ice that little triangle in the center
of the windshield and the passenger mirror corner in a snow storm! I
haven't needed to use full defrost yet to do that either which means the
toes stay hot.

Here is a link on the job:
http://www.off-road.com/jeep/tech/body/heater.html

There are two blower motors some parts stores have on the shelf. The
cheap regular one and a premium one. You want the cheaper one which is
the one with the shorter shaft. The premium one has a shaft about 1/4"
too long for the Jeep. Best is to take your old motor with you just to
make sure.

You just need to make a slightly larger hole in the firewall to fit the
larger motor, everything else is a direct fit. The Jeep squirrel cage
fan fits right on. I used to have a link on an easy hole cut, but it
doesn't work anymore.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Dan wrote:
>
> I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks, Dan.

Re: Heater Parts question. Now CJ7 Fan change too.
 

That is the fan speed resistor block.

While you are in there you could convert the heater to a big GM blower
that will defrost 'all' the windows, literally cook your feet and allow
you to drive at -25 with no gloves, boots, ski pants or parka on. All
for about $25.00!

It puts out more on low than the stock one does on high and that is no
exaggeration. It will _even_ de-ice that little triangle in the center
of the windshield and the passenger mirror corner in a snow storm! I
haven't needed to use full defrost yet to do that either which means the
toes stay hot.

Here is a link on the job:
http://www.off-road.com/jeep/tech/body/heater.html

There are two blower motors some parts stores have on the shelf. The
cheap regular one and a premium one. You want the cheaper one which is
the one with the shorter shaft. The premium one has a shaft about 1/4"
too long for the Jeep. Best is to take your old motor with you just to
make sure.

You just need to make a slightly larger hole in the firewall to fit the
larger motor, everything else is a direct fit. The Jeep squirrel cage
fan fits right on. I used to have a link on an easy hole cut, but it
doesn't work anymore.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Dan wrote:
>
> I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks, Dan.

Re: Heater Parts question. Now CJ7 Fan change too.
 

That is the fan speed resistor block.

While you are in there you could convert the heater to a big GM blower
that will defrost 'all' the windows, literally cook your feet and allow
you to drive at -25 with no gloves, boots, ski pants or parka on. All
for about $25.00!

It puts out more on low than the stock one does on high and that is no
exaggeration. It will _even_ de-ice that little triangle in the center
of the windshield and the passenger mirror corner in a snow storm! I
haven't needed to use full defrost yet to do that either which means the
toes stay hot.

Here is a link on the job:
http://www.off-road.com/jeep/tech/body/heater.html

There are two blower motors some parts stores have on the shelf. The
cheap regular one and a premium one. You want the cheaper one which is
the one with the shorter shaft. The premium one has a shaft about 1/4"
too long for the Jeep. Best is to take your old motor with you just to
make sure.

You just need to make a slightly larger hole in the firewall to fit the
larger motor, everything else is a direct fit. The Jeep squirrel cage
fan fits right on. I used to have a link on an easy hole cut, but it
doesn't work anymore.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Aug./05 http://www.imagestation.com/album/in...?id=2120343242
(More Off Road album links at bottom of the view page)

Dan wrote:
>
> I am replacing the tub on my '83 CJ7 and there is some electronics on the
> heater ductwork that I do understand. Just above the vent by the passenger
> floorboard there is a three wire plug that goes to a coil inside the
> ductwork. Could someone tell me what this is or it's function? Thanks, Dan.

Re: Heater Parts question. Now CJ7 Fan change too.
 

Thanks for your help! I think that having more heat in the winter would be a
great thing. I am going to go find a larger fan motor tomorrow. Thanks
again...Dan.

Re: Heater Parts question. Now CJ7 Fan change too.
 

Thanks for your help! I think that having more heat in the winter would be a
great thing. I am going to go find a larger fan motor tomorrow. Thanks
again...Dan.

Re: Heater Parts question. Now CJ7 Fan change too.
 

Thanks for your help! I think that having more heat in the winter would be a
great thing. I am going to go find a larger fan motor tomorrow. Thanks
again...Dan.