How A Heater Control Valve Works With Diagram In The Garage With Summary. heater control valves control the flow of coolant through the heater core. the most common signs of a faulty heater control valve include inoperative heaters and coolant leaks. the location of the heater control valve varies from vehicle to vehicle, but it can typically be found with the heater core’s inlet hose. contents hide. Customer: i need a diagram on which hose goes where for the heater control valve on my 1998 astro van my friend replaced my alternator and discovered that the valve was broke and he unhooked it and hasn't returned and i don't know how it was hooked up mechanic's assistant: the chevy mechanic can find the right diagram for you.
Heater Control Valve Hcv вђ Swartz Garage 1968 non ac heater control vacuum hose schematic. bubba disconnected all the vac lines from the heater box plenum actuators. i'll need to get new vac control hoses anyway, but i have no idea how these puppies hook up! there are 2 actuators, a larger vertical one at the driver's side end of the heater box and a smaller horizontally mounted one. The control valve sits at the passenger side rear of the intake manifold, parallel to the valve cover. this is where the heater control cable should reach. you should have gotten a prebent hose with 2 90° bends. this connects the control valve to one of the heater core connections. To 78 heater control vacuum lines and install. c3 general 78 heater control vacuum lines and install thanks again in advance. this forum has been great and appreciated. i just received my new heater control system and need to install. the old one has a vacuum nozzle that had no line on it. i am not sure if this is by design or the previous. As many have noted, those plastic valves are notorious for breaking way too easily, and most everyone suggests you have a new one in hand before attempting to replace heater hoses. put 'astro van heater control valve' into an amazon search. it will show the 6 port as a gm #15 5551, and the 4 port as a gm #15 5557 show that to your local parts guy.
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