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Rx 300 Heater Problem

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I have a heater problem with my RX300 SE-L (09/2003) - 2004 model.

Has anyone experienced the following fault, or any ideas what the problem could be?

No heat flow from passenger side heater vents (aircon OK). Driver side heater OK.

Radiator coolant level full. If heating temperature controls are set to 'max hot' there is a slight smell coming from the driver vents but this goes completely as soon as soon as another temperature is selected. The cabin filter is new. There is no difference to these conditions whether the 'Dual' switch is set to independent or linked mode.

Many thanks for your replies


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