| Notes on auxiliary heater operation on vehicles with diesel engine |
| Problems with auxiliary heater operation may be encountered in cold weather (usually the only conditions under which the auxiliary heater is switched on) if use is made of vegetable-oil or rape-oil methylester as fuel. |
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| On account of the physical properties, deposits may form during operation with vegetable-oil or rape-oil methylester in the auxiliary heater combustion chamber (burner element). These then cause combustion problems if the vehicle is run for lengthy periods on vegetable-oil or rape-oil methylester (no flame formation and deflagration in combustion chamber). |
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