heater core replacement -- cj7
 

I don't have any heat....

Can someone diagnos the problem. Both the line in and out of the
heater core are hot (warm). Is this a faulty heater core or is
something else amiss? The blower motor functions (but only blows cold
air). Everything is original equipment (84 CJ7).

Also, how do I burp the system?

Thanks

DEP

Re: heater core replacement -- cj7
 

Sounds like you have a linkage issue.

The heater hoses warm means you have flow.

There is no shut off for the fluid flow, only flaps that either blow air
across the heater core or bypass it and just blow cold air.

One main control for this is wayyyy up top. Heat or vent or off.

Is the door open down on the passenger side? That would mean the cold
air vent is active. Follow the cable up to the top to find the lever.

If not, then check the connection right by the gas pedal. The cable
pulls out for heat and pushes in for cold air.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave wrote:
>
> I don't have any heat....
>
> Can someone diagnos the problem. Both the line in and out of the
> heater core are hot (warm). Is this a faulty heater core or is
> something else amiss? The blower motor functions (but only blows cold
> air). Everything is original equipment (84 CJ7).
>
> Also, how do I burp the system?
>
> Thanks
>
> DEP

Re: heater core replacement -- cj7
 

Sounds like you have a linkage issue.

The heater hoses warm means you have flow.

There is no shut off for the fluid flow, only flaps that either blow air
across the heater core or bypass it and just blow cold air.

One main control for this is wayyyy up top. Heat or vent or off.

Is the door open down on the passenger side? That would mean the cold
air vent is active. Follow the cable up to the top to find the lever.

If not, then check the connection right by the gas pedal. The cable
pulls out for heat and pushes in for cold air.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave wrote:
>
> I don't have any heat....
>
> Can someone diagnos the problem. Both the line in and out of the
> heater core are hot (warm). Is this a faulty heater core or is
> something else amiss? The blower motor functions (but only blows cold
> air). Everything is original equipment (84 CJ7).
>
> Also, how do I burp the system?
>
> Thanks
>
> DEP

Re: heater core replacement -- cj7
 

Sounds like you have a linkage issue.

The heater hoses warm means you have flow.

There is no shut off for the fluid flow, only flaps that either blow air
across the heater core or bypass it and just blow cold air.

One main control for this is wayyyy up top. Heat or vent or off.

Is the door open down on the passenger side? That would mean the cold
air vent is active. Follow the cable up to the top to find the lever.

If not, then check the connection right by the gas pedal. The cable
pulls out for heat and pushes in for cold air.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Dave wrote:
>
> I don't have any heat....
>
> Can someone diagnos the problem. Both the line in and out of the
> heater core are hot (warm). Is this a faulty heater core or is
> something else amiss? The blower motor functions (but only blows cold
> air). Everything is original equipment (84 CJ7).
>
> Also, how do I burp the system?
>
> Thanks
>
> DEP

Re: heater core replacement -- cj7
 

>From: Mike Romain romainm@sympatico.ca
>Date: 10/31/03 2:11 PM EST
>Message-id: <3FA2B3C9.9311639E@sympatico.ca>

>Is the door open down on the passenger side? That would mean the cold
>air vent is active. Follow the cable up to the top to find the lever.
>

Then remove this cable and send it to me since I broke mine when Mr. Romain
suggest I upgrade my blower motor. :-)

A very good upgrade I might add.

Re: heater core replacement -- cj7
 

>From: Mike Romain romainm@sympatico.ca
>Date: 10/31/03 2:11 PM EST
>Message-id: <3FA2B3C9.9311639E@sympatico.ca>

>Is the door open down on the passenger side? That would mean the cold
>air vent is active. Follow the cable up to the top to find the lever.
>

Then remove this cable and send it to me since I broke mine when Mr. Romain
suggest I upgrade my blower motor. :-)

A very good upgrade I might add.

Re: heater core replacement -- cj7
 

>From: Mike Romain romainm@sympatico.ca
>Date: 10/31/03 2:11 PM EST
>Message-id: <3FA2B3C9.9311639E@sympatico.ca>

>Is the door open down on the passenger side? That would mean the cold
>air vent is active. Follow the cable up to the top to find the lever.
>

Then remove this cable and send it to me since I broke mine when Mr. Romain
suggest I upgrade my blower motor. :-)

A very good upgrade I might add.

Re: heater core replacement -- cj7
 

Hrd wrote:
>
> >From: Mike Romain romainm@sympatico.ca
> >Date: 10/31/03 2:11 PM EST
> >Message-id: <3FA2B3C9.9311639E@sympatico.ca>
>
> >Is the door open down on the passenger side? That would mean the cold
> >air vent is active. Follow the cable up to the top to find the lever.
> >
>
> Then remove this cable and send it to me since I broke mine when Mr. Romain
> suggest I upgrade my blower motor. :-)
>
> A very good upgrade I might add.

LOL!

Well as mentioned, you didn't ask how to take the sucker apart.

You can make a new cable core pretty easy. A wire from a lawnmower
throttle or the left over chunks from a manual choke cable would work.
The adjuster could be fabbed from a motorcycle brake cable adjuster if
yours broke.

If you were anywhere near me I have a bunch of left over choke cable
chunks from installing them on other's and my vehicle.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Re: heater core replacement -- cj7
 

Hrd wrote:
>
> >From: Mike Romain romainm@sympatico.ca
> >Date: 10/31/03 2:11 PM EST
> >Message-id: <3FA2B3C9.9311639E@sympatico.ca>
>
> >Is the door open down on the passenger side? That would mean the cold
> >air vent is active. Follow the cable up to the top to find the lever.
> >
>
> Then remove this cable and send it to me since I broke mine when Mr. Romain
> suggest I upgrade my blower motor. :-)
>
> A very good upgrade I might add.

LOL!

Well as mentioned, you didn't ask how to take the sucker apart.

You can make a new cable core pretty easy. A wire from a lawnmower
throttle or the left over chunks from a manual choke cable would work.
The adjuster could be fabbed from a motorcycle brake cable adjuster if
yours broke.

If you were anywhere near me I have a bunch of left over choke cable
chunks from installing them on other's and my vehicle.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Re: heater core replacement -- cj7
 

Hrd wrote:
>
> >From: Mike Romain romainm@sympatico.ca
> >Date: 10/31/03 2:11 PM EST
> >Message-id: <3FA2B3C9.9311639E@sympatico.ca>
>
> >Is the door open down on the passenger side? That would mean the cold
> >air vent is active. Follow the cable up to the top to find the lever.
> >
>
> Then remove this cable and send it to me since I broke mine when Mr. Romain
> suggest I upgrade my blower motor. :-)
>
> A very good upgrade I might add.

LOL!

Well as mentioned, you didn't ask how to take the sucker apart.

You can make a new cable core pretty easy. A wire from a lawnmower
throttle or the left over chunks from a manual choke cable would work.
The adjuster could be fabbed from a motorcycle brake cable adjuster if
yours broke.

If you were anywhere near me I have a bunch of left over choke cable
chunks from installing them on other's and my vehicle.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's