Heater valve?

[euroZ06]

On my recent trip to a car show, i noticed that im getting hot air in cabin (im in miami, soooo its 100f outside, plus another 200 coming from under the dash).

The car was fully restored a few years ago (by previous owner), and it appears that the heater system is all fresh (looks new), but I assume its the heater control valve that failed.

I looked at the heater buttons, and i see no lever coming from any of them... is it possible that the sytem was upgraded somehow so that there are no longer levers? If so, how/where do i find the lever to try and close the valve? I don't use heat, since... miami...

Car looks stock, and is mint, so ideally id like to replace the control valve, to keep it stock looking, but the logic says i should just put a manual valve and close it off for good. Any recommendation on that? if so, can you recommend a valve/size? and which hose do i instal it on?

68 charger/383

[70 sublime]

On a factory 68 69 70 Charger without air conditioning there is nothing used to turn the hot water off from going through the rad under the dash
I do not know if a factory air car has a valve in the water system

You could just take the water hoses off going to the firewall if you will never need the heat to defog the windshield

[b5blue]

Post pictures so we see what you have?

[A383Wing]

does your car have factory AC?? If not, then there is no heater control valve, just a blend door inside the heater box controlled by a cable

[John_Kunkel]

In '68, both heater hoses are 5/8". You can install a manual shutoff valve (available at your LAS) in the inlet hose.

[euroZ06]

On a factory 68 69 70 Charger without air conditioning there is nothing used to turn the hot water off from going through the rad under the dash
I do not know if a factory air car has a valve in the water system

You could just take the water hoses off going to the firewall if you will never need the heat to defog the windshield

sorry, should have clarified. Its a factory AC car.

[A383Wing]

there is a factory heater valve on the firewall, service manual will show you where it's at.... you should also have a lever in the dash to control the amount of water passing through the valve to control temperature

there are kits out there to rebuild the valve if needed, available from NAPA...also, I have heard that a Volvo valve is very close

Bryan

[euroZ06]

Gents,

So i decided to take out my glove box, and take a look inside. Again, 68 charger, factory AC car.

So on the control panel, I have temperature lever, which has a cable going to the heater control valve (?). When I move the lever, it moves the lever on the control valve. I can also move it down there by hand, it moves fairly easy. Everything looks pretty new down there. So does it mean that the heater control valve is leaking inside/not sealing correctly when lever is moved? I  read this article for reference http://www.sw-em.com/Heater_Control_Valve.htm

[euroZ06]

Gents,

So i decided to take out my glove box, and take a look inside. Again, 68 charger, factory AC car.

So on the control panel, I have temperature lever, which has a cable going to the heater control valve (?). When I move the lever, it moves the lever on the control valve. I can also move it down there by hand, it moves well, not too hard, not too easy, with normal resistance. Everything looks pretty new down there. So does it mean that the heater control valve is leaking inside/not sealing correctly when lever is moved?

[ALBSURE1091]

Bu the looks of that picture your valve looks pretty dam clean. Perhaps it was rebuilt already?

[euroZ06]

Bu the looks of that picture your valve looks pretty dam clean. Perhaps it was rebuilt already?

yea, it looks new... any ideas what else it could be? or what is going on?

[A383Wing]

are you sure the heater hoses are connected correctly per the service manual? If backwards, water could be forced past the rubber seal inside the valve

Bryan

[euroZ06]

are you sure the heater hoses are connected correctly per the service manual? If backwards, water could be forced past the rubber seal inside the valve

Bryan

do you by chance have a screenshot from service manual?

I didn't have this problem before.

[John_Kunkel]

From the '69 FSM:

[ALBSURE1091]

are you sure the heater hoses are connected correctly per the service manual? If backwards, water could be forced past the rubber seal inside the valve

Bryan

I had same issue. Hoses were hooked up backwards so hot water kept flowing.

[euroZ06]

the tubes are connected correctly

Can I unplug the inbound hose and try to close the valve with a screwdriver (pushing on it from inside)(will there be a lot of coolant)? or is it likely that the valve just failed and there's no fixing it?

[A383Wing]

I would take both hoses off the valve and have someone move the lever and with a small light, take a look in the hose nipples and see if it's moving inside the valve. Just because the lever is moving on the outside, doesn't mean it's working inside

Bryan

[Hemidog]

I have a factory A/C car, and I've rebuild one of those Ranco heater valves. They are not exactly the greatest design, and I believe they do let some water through in the best of circumstances, It also feels like the "return" hose transmit heat into the cabin when the valve is closed. (Yes, it is connected in the front of the WP)

I would like to install one of these that bypasses and returns the warm coolant in the engine bay, but it wouldn't look good. https://www.ebay.com/itm/152926048118?_trkparms=ispr%3D1&hash=item239b1a4f76:g:RbUAAOSwm-NgmIyp&amdata=enc%3AAQAGAAACkPYe5NmHp%252B2JMhMi7yxGiTJkPrKr5t53CooMSQt2orsStEKTPzZMfQmny3knR97t0DFrk6DbFvvuMKIZ%252ByL8i%252FKjih2BZFbZ%252Bb6m3AFI7WiqV09rMLvQzpz%252FLarQ1FB2iq7jY51E8PRvdk4WZ7aCUYILXkM5sKKdFCi%252BUSh%252Bv63iTWWFJDw0JjgeA%252BIIaAhsH%252BdPXXuPyI5L0LuXnaoVIHCjcQNc3%252B2f4gq%252BVs4mw0TawXmYzEnwyOZKWiovdvXY6Q1WZidOzLIBEqAwoTOmk0qj%252FZVWYXaf1gBKJRzAmSsJCiUcokBez7jnVMB%252BM470i%252F2yMRDQkrwIDiK1z5rE5GJjmho%252FCn4TprUJO2R8gMy7pnoIoI1JliUpkTOXffRnajT9hoDLDN%252F5DaWbmFio5E%252FoSzBuwPn3o9BMowDHIxmy2dzIDFXRKj8pu3ddmh%252B9x9d%252BtVRFRZLIebYiMp9Ms6Htt3OUXTzZPf6biiFk9lZqFeEQcj0igyxUQNYSvN5l3%252FWLrbq1qttTvnQ78cy4HFptpwPBjl5%252F0bpgaYGUmWzoRxs4PVrdSz9HmgyTBqEc8hqkxbFAPRdYrE31y4%252FrL3vxMyYqIYXavPqwCHbJ6D7fAbWRFEBElbh3WntgjPAJfEiZV%252FQzF8r71BdM5SyWbvvsEnJwSkKB1a8WxaBKL6h0GD0LB%252F05BwNPbMNIdRnkJ%252FTI93b7cocRp77P1G%252F1vS%252BLUva5KKwmy6SieaY0mMkTs4qgnkx2e7Di1LqxIQK%252FWVX3MOlW%252BMTTlQhq0Bocgcau%252FjnczoEJdiRQgvD8NvCbC6vzMxtQgTcPPjYUuUI20xTqosx%252FtnpPBoq4fmk1F0KhL5DK5lM56MoJpZ5cRfaP%7Campid%3APL_CLK%7Cclp%3A2334524

[cdr]

There are 2 heater valves on a factory ac car, one inside of the ac box & one on the fire wall, on the firewall one it has a rubber seal that gets hard & wont seal the water passage. you can bypass that ronco valve by connecting the heater hoses direct to the 2 heater core tubes coming out of the firewall & put a manual shut off valve like John posted

[xsr/tse]

I rebuilt my heater control valve. (69 charger) and in the off position, it wasn't sealed shut. Knowing that this would let some hot water into the heater core. I took it apart and made my own seal. It totally seals now. Living in Florida, I need to keep all the heat away!

[cdr]

I rebuilt my heater control valve. (69 charger) and in the off position, it wasn't sealed shut. Knowing that this would let some hot water into the heater core. I took it apart and made my own seal. It totally seals now. Living in Florida, I need to keep all the heat away!

Mine sealed pretty good with the rebuild kit, I switched the in & out hoses on the valve & the pressure of the coolant direction pushes on the backside of the seal & it works great

[Hemidog]

I rebuilt my heater control valve. (69 charger) and in the off position, it wasn't sealed shut. Knowing that this would let some hot water into the heater core. I took it apart and made my own seal. It totally seals now. Living in Florida, I need to keep all the heat away!

Mine sealed pretty good with the rebuild kit, I switched the in & out hoses on the valve & the pressure of the coolant direction pushes on the backside of the seal & it works great

Interesting, so the opposite of this?

[cdr]

I rebuilt my heater control valve. (69 charger) and in the off position, it wasn't sealed shut. Knowing that this would let some hot water into the heater core. I took it apart and made my own seal. It totally seals now. Living in Florida, I need to keep all the heat away!

Mine sealed pretty good with the rebuild kit, I switched the in & out hoses on the valve & the pressure of the coolant direction pushes on the backside of the seal & it works great

Interesting, so the opposite of this?

yes the two hoses on the right side of the valve top to bottom, make sure they are connected the correct way on the engine, Others my have different results
than me