68 Fury, no heat...

[Progrocker74]

Well i have another problem. Had great heat since buying the car, all the sudden last week i have no heat.
I can hear tbe flap open and close, as well as a click when i depress the hi defrost button.. so... I'm guessing that the vacuum system is working as it should. I have some heat coming out of the vents, but no blower motor.. so its not the heater core.
I found a new blower motor resistor and installed it, still nothing .
About the only thing left that i can think of is the auto temperature relay.

Just looking for some advice as its getting to be a frigid wasteland here in Chicago. Need to get this fixed as i drive it every day..

 

[commando1]

And your car is....

 

[Progrocker74]

68 fury iii..

 

[Progrocker74]

Oh.. forgot to mention that I akso replaced the blower motor too.. so it's not that..

 

[commando1]

Auto temp relay? In a 68 Fury?
Does your heater controls have a sliding temperature lever?

 

[C Body Bob]

Is your cars engine warming up to proper temp. As in the thermostat is not stuck open?

 

[Progrocker74]

Auto temp relay? In a 68 Fury?
Does your heater controls have a sliding temperature lever?

As far as i can tell it has a relay/temp sensor. And its the 5 button selector, no slider.

 

[Progrocker74]

Is your cars engine warming up to proper temp. As in the thermostat is not stuck open?

Engine warms up fine, thernostat opens and closrs correctly. I never go past 190 temp wise except for really hot summer days, then it might top off at 200.

 

[Progrocker74]

It has to be something with whatever turns on the blower motor.

 

[commando1]

As far as i can tell it has a relay/temp sensor. And its the 5 button selector, no slider.

OK. I just needed to be sure. AutoTemp I in a 68 Fury is very rare.

 

[Progrocker74]

OK. I just needed to be sure. AutoTemp I in a 68 Fury is very rare.

Haha, i hear that, but yes it has one. I can see it. I do have access to a replacement part, but don't want to plunk out $90 for it if i don't need it.
Also forgot to mention that i smelled burning wiring a few weeks ago, but cant find any bad wiring anywhere, so all i can guess is that the auto temp sensor fried before anything else.
Already checked and replaced fuses as well. Fuse was fine, but i replaced it anyway for good measure.

 

[commando1]

A 1968 AutoTemp I relay for $90.00?
Buy it anyway.

 

[C Body Bob]

Is there a resistor on the blower. Check wiring & contacts. Clean contacts. Make sure ground is good & clean

 

[Progrocker74]

A 1968 AutoTemp I relay for $90.00?
Buy it anyway.

Just ordered it haha.. it's the only one i could find.

 

[Progrocker74]

Is there a resistor on the blower. Check wiring & contacts. Clean contacts. Make sure ground is good & clean

No resistor on the blower. Just pos/neg. Wiring is all new and clean.
It worked fine before,.
Also heard that theres a vacuum switch behind the push button thinger that turns the blower motor on and off.. going to tear the dash apart tomorrow and see what the deal is. I need to lubricate the push buttons anyway as they stick real bad...

 

[C Body Bob]

I'm parting a 68 Fury so if I can help let me know

 

[1978 NYB]

Can you tell if the control valve on the heater hose is opening and closing?

 

[Progrocker74]

I'm parting a 68 Fury so if I can help let me know

Thanx Bob, i know you have one. I just dont make much $ haha..

 

[Progrocker74]

Can you tell if the control valve on the heater hose is opening and closing?

Thats another thing, but yes, i have no idea if it is or not. Kind of hard to check one of those. I may end up replacing it if nothing else works..
Like i said earlier, i have heat coming out of the vents, just no blowing air. So i wouldn't think that would be it.
With the burning wiring smell, I'm leaning towards the auto temp relay.

 

[1978 NYB]

This is why I'll never own an Auto Temp car....LOL!