Try cleaning the petrol cap. it breaths round the key hole. i boiled mine. sometimes if there is not enough air in the tank. pure fule goes into the carb. and makes the car race. take fule cap and boil it in water. you can use steradent in cold water if you prefer. muck gets stuck in them.
liz.
Engine revs on its own. if i switch it of the start it again its ok. every now and then. yours les wilson.
SOURCE: My Renault Megane Scenic S reg heater is not working
Most likely to be a faulty resistor block, which has 3 resistors and a thermal fuse controlling fan speeds 1,2 and 3, maximum speed 4 by-passes the resister block. It may also be poor electrical connections to the resistor block caused by overheating. Renault ask for approximately £350 to carry out repairs, a replacement resistor block will cost £50. If you decide to carry out the repairs yourself, be advised that if you are not competent to carry out such work you, could cause electrical damage or worse an electrical fire.
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