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How do you control the heater on a 1989 300E...The heat won't turn off?
Wiki User
∙ 12y ago
possibly you've got a stuck up water valve that's why the hot water continously flows to the heater coil, for the meantime to cut it off open the car hood and look for two rubber hose that is being connected to the engine side and the other end is connected to a aluminum or steel tube that is coming out of the dust board front in the hood. it is the water supply going to the coil heater inside the car. Remove the hose clamp ( engine is cold ) and put a temporary plug to both hose. Then have the heater valve and coil be check by a qualified car aircon tech.
Wiki User
∙ 12y ago
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