Hi
When I turn on the heater nothing happens until I get to the 4th setting and it works at full tilt as normal but nothing on the first 3 settings.Is the switch causing it?
thanks
heater switch
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Brianmoooore
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And the usual cause of that failing is a fan motor whose bearings are beginning to seize through lack of lubrication.sweep wrote:its the resistor by the sounds of it
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Grrrmachine
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'89 325i Touring | Touring Resto Thread | In-Dash Screen install
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Brianmoooore
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The resistances are very low - 0.8, 1.0 and 1.6 ohms, and there's also a thermal cut out on the pack that should have zero ohms between its contacts. The cut out is the usual part that fails (on the small brown version at least), and as I've said further up, this is usually caused by a partially seized fan motor stressing the cut out.