Honda Accord Cooling System?

I have a 2005 Honda Accord EX 2.4 L. There's a small black box behind the engine. A hose comes into the box from the engine and a hose leaves the box and goes into the firewall that separates the engine compartment from the car cabin. This box has a screw that goes into the front of it and connects to what looks like a 10 speed bike cable. This screw has broken off and water comes out of the hole just as soon as I put it into the radiator. I need to replace this part but have no idea what it is. Can anyone tell me a name for the piece that is broken?

If it has a cable, it's almost certainly the heater valve. Check by turning the heater to "hot", and note the position. Then turn heater to "off" and check again. If the cable and linkage moved, it's the heater valve. Easiest thing to do is to go to a junkyard and buy the replacement part there -- no guarantee how long it lasts, but it's cheap, available, and it fits. Be sure to keep fresh coolant in the car to prevent recurrence.

Heater Control Valve?
Got a picture?

Looks like it is the heater control valve. Picture on autozone website matches the part I pulled off the car.

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