Recent content by jockodog

Do you know the diameter/size (inside and/or outside diameter) of the vacuum hose to heater bypass valve?

That is very helpful info. Thanks. Much appreciated.

I already know my blend door and/or motor needs to be replaced. I have both already. Except for the engine, there was a lot of deferred maintenance.

Thanks for that info. I am in the process of replacing all AC components due to a chronic leak which has not been found, so I will to reinstall the control valve and its vacuum line. That would be coming from the dash the back of the dash controls, right? MAX-AC is a virtual necessity in the...

All HVAC controls are dial-operated and by vacuum. It is my understanding that the MAX-AC dial position would do two things...move the outside air door to closed (recirculate) and also close the heater control valve to stop coolant flow to core. Thanks for you input.

It is possible a previous owner removed the control valve entirely from the heater core inlet/outlet hoses, but I cannot find any loose vacuum line that would've been connected to it.

I have read in other forums, that on some Rangers, the blend door is the only control of heat....dash knob controls all cold or all heat or a mixture.

Is it possible my '97 Ranger 2.3L RWD doesn't have a heater control valve? It could have been removed. Are some 97 2.3 Rangers designed without heater control valves?