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Heater Control Valve? 200 1989

posted by  Art Benstein on  Mon Mar 22 02:25 CST 2010
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last visit: Fri Oct 17 20:10 CST 2014
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Hi Don,

Do I understand you rightly? You've had a new heater control valve replaced by a Volvo dealership tech, the cable is bottoming in its travel to close the valve, and it is still getting hot in the car? Is this a metal valve with the capillary tube feedback?

My recent belief is Volvo has been substituting the plastic valves used in the 93 production 240s (simple, non-feedback valves) because the Ranco type were no longer available.

If you have the good valve (metal, thermostat type) it may just be out of adjustment. There's a small cam moved by a Torx screw that adjusts the influence of the wax motor in the thermostat portion. Volvo's A/C manual suggests turning it some:

"Warm up the engine.

Move the heater control to off (closed) and check that the input hose from the engine to the heater control valve is cold. If not, turn the adjuster screw (arrowed) 3/4 turn clockwise."





--
Art Benstein near Baltimore

Never test the depth of the water with both feet.






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New Heater Control Valve? [200][1989]
posted by  122s nut  on Sun Mar 21 07:31 CST 2010 >


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