67GTX440
Well-Known Member
While removing the heat/AC box from under the dash to replace a leaking evaporator, it was
noted that the copper wire looking connector that runs from the bottom of the heat/AC box to the water valve in the firewall was snapped off from the water valve. (See pictures.) I called Classic Air who had rebuilt my heat/AC box to ask about the function of this probe and although they could not really explain the function rather than to somehow regulate flow to the heater core. They said it was a somewhat unnecessary part as water flow open or closed was regulated by the cold/hot lever on the heater control that manually opens or closes the water valve to the heater core and if they rebuild a heat/AC unit where the probe was damaged they just crimp it off. Not sure of the copper piece is actually solid or hollow inside and how it transfers a heat reading. They said this part not being replaced would not interfere with the working of the AC or the heat. Still, it would seem to have had some original function.
Can anyone explain what the probe running to this valve was designed to do? Is it supposed to close the manual valve somehow if it fails?
The guy at Classic Air also said this part is "unobtainium" from any aftermarket source and if you needed one you were pretty much stuck with buying one used that would probably need rebuilt. Classic Air does rebuild them if they are intact.
If I put things back together without this, should I just go ahead and remove the probe end from the heat/AC box and does it need to be pinched off where it is broken at the valve at the top?
noted that the copper wire looking connector that runs from the bottom of the heat/AC box to the water valve in the firewall was snapped off from the water valve. (See pictures.) I called Classic Air who had rebuilt my heat/AC box to ask about the function of this probe and although they could not really explain the function rather than to somehow regulate flow to the heater core. They said it was a somewhat unnecessary part as water flow open or closed was regulated by the cold/hot lever on the heater control that manually opens or closes the water valve to the heater core and if they rebuild a heat/AC unit where the probe was damaged they just crimp it off. Not sure of the copper piece is actually solid or hollow inside and how it transfers a heat reading. They said this part not being replaced would not interfere with the working of the AC or the heat. Still, it would seem to have had some original function.
Can anyone explain what the probe running to this valve was designed to do? Is it supposed to close the manual valve somehow if it fails?
The guy at Classic Air also said this part is "unobtainium" from any aftermarket source and if you needed one you were pretty much stuck with buying one used that would probably need rebuilt. Classic Air does rebuild them if they are intact.
If I put things back together without this, should I just go ahead and remove the probe end from the heat/AC box and does it need to be pinched off where it is broken at the valve at the top?
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