Red light.

[AniaSM]

I own a Renault Megane. Theres a red light showing on the dashboard. Ive looked at the manual and it says its the coolant temperature warning light. How do I fix it without taking it to a garage and getting conned?

[johnlambert]

Check that you have enough coolant,
under the bonnet most cars have marked any liquids the driver needs to top up with yellow caps, look for one with a warning sign that says "do not remove while the engine is hot" or words to that effect, there may even be a mark where the coolant level should be.

[essex bloke]

morning , the sensor for the light is normally located in the thermostate housing( which the top hose off the radiator goes on to) if you buy one from a renault dealer normally a tenner then it will help you identify it when you came to replace it ..

[AniaSM]

Thanks guys. When I take my car to the garage it comes out with more faults than when it went in. Usually.

[AniaSM]

Sorry. One more thing. Is engien coolant just tapwater?

[annie0000]

No, you need to buy engine coolant - sometimes known as antifreeze - they will have it in halfords, your local petrol station or even in tesco - you need to dilute to the correct consistency depending on summer or winter. If you have nothing in there at all, put a bit of water in there to get you going, then get the proper coolant in asap.

[sad old git]

Check under the hood, first check your radiator for leaks, if that is ok check all your hose connections for any leaks;If all that is well I would suggest you top up your expansion tank (usually located,I think to the left of the radiator). That's the only way I know of how to get some coolant back into the system. Once the system is circulating you will need to check again for any leaks, best I can do.Sorry.

[david1702198]

you could always try putting water in the cooling system. no wonder garages would rip you off.