95 Olds Cutlass Supreme. The heat has stopped working which would tell me the thermostat needs replaced, but also the Temp gauge shoots up to max temp and gives me a "HOT" dummy light within about a minute of running the engine, but feeling around, just a spot towards the bottom of the engine feels warm, cold everywhere else.
I have the same problem, i replaced the thermostat multiple times and even changed the water pump, using autozone parts. I still kept losing my heat and the thermostat would be junk after only a few days, then i used napa parts and the only problem i have now is the temp gauge shoots up but the car is not hot which leads me to believe i have a slight electricle problem somewhere with the sensor.
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Re: Overheating and Heat doesn't work
Sounds to me like air trapped somewhere in the coolant's path. You said there's a warm spot on top of the engine. This makes me think of possibly a cracked intake manifold or cylinder head. Did it overheat right before this started? I would have the coolant system 'back flushed' and if the problem is still there, I'd next do a compression test (with the radiator cap off).and check to see if there are air bubbles in the radiator while testing. Good luck, please let me know what you find.
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Bummer deal! You have 2 problems. Your radiator or maybe the thermostat needs replaced - they are prime suspects. The valve that lets hot coolant run into the heater is bad. Of course, when your radiator coolant is low, the coolant won't reach the car heater.
Hope these checks prove helpful. The products at this link may be very helpful. http://www.auto-tune-up-and-repair-options.com/Radiator-cooling-system.html
If it's the water pump, you should be able to see it dripping just behind the pulley. The seal on the water pump is usually what goes. If there is antifreeze drips all over the front of the engine, and it drips a bit after you shut it off, it likely is the water pump.
If it runs poorly when you first start it in the morning, however, you could still have a head gasket problem. If that is the case, you will see a lot of white exhaust, which is the cylinder blowing the antifreeze out. One thing you can do is run it with the rad cap off, and see if it continues to bubble. If it does, then your head gasket is leaking. I am assuming it is a V6, so keep in mind that you have 2 head gaskets. The other oine could be gone now if it wasn't replaced.
Start by checking the fuses that's simple than relay than bulbs last you may have to remove the steering wheel and than replace the entire signal assembly those are pretty much all your options so start with 1 and work your way down the list
Over heating can be caused by a faulty thermostat and or weak water pump and dirty radiator and old antifreeze or the radiator fan now working when at idle but should not over heat when driving. Service the cooling system if it has never been serviced before. Replace the thermostat, buy some radiator flush to clean out the radiator and heater core. Just follow the instruction and replace the antifreeze and make sure it's a 50/50 mix water/antifreeze. If you not sure how to mix it 50/50 you can buy them 50/50 premixed. Water boils at 100'C so you need antifreeze mixed with it but antifreeze does not have the same heat transfer as water so you cannot run 100% antifreeze cause it does not transfer heat fast enough and you over heat. Good luck and hope this helps. Keep me posted, Be glad to help, once you service the cooling system and your still over heating, then we look at the water pump.