Hello Mark,

I know you have posted on several subjects in a number of threads I have not read, and at least one where I offered a response, so forgive me if I am missing a point.

If you put your fingers on the heater hoses, finding both hot, even though the heater control cable has the valve as completely closed as possible, the valve's seating may have deteriorated beyond help. However, that is not so common as a failure of the capillary feedback device meant to regulate the air temperature.

In some cases you can extract some more life from the valve by adjusting the regulation mechanism as shown highlighted in the picture below. If you want to stop all the heat, you might be able to simply drain the coolant, pull the inlet hose and fit a rubber stopper into the hose before reconnecting it-- a slightly easier task than trying to bypass it under the hood with the exposed old molded heater hoses. Relive your Blower Motor Replacement Experience