2001 Daewoo Nubria heater stopped working and is now overheating

Remove the passenger side front rocker trim panel. Remove the lower B--pillar trim panel. Reposition the carpet. There is the fuel cutoff inertia switch with reset button.

The Daewoo range of cars have two main problems with cooling system the thermo switch under the coilpack (2 pin) very rarely ever works properly over 20 c this means that your fans do not switch on when the car is hot, easiest way to check switch aircon on and the fans should work , if they don't .replace with an after market switch and relay can be bought from parts accessories stores , the radiators are by far too small they can be replaced with minor fabrication ( sheetmetal) by a Vt-Vy radiator v8 is best in all cars for overseas the Pontiac 2001-2006 check your measurement and with a couple of new hoses and a extension to the bottom hose the over heating disappears if there is milk coloured oil under your oil fill cap your head or possibly motor may need to be replace the best engine out of these engines is either the c20 sel or the c22sel

Your heater core is probably clogged or bad. It is usually on the passengers side under the glove box. You may also want to check the heater valve on the hoses. Its a control valve that hooks by one of two hoses running to the fire wall. They also go bad. A much simpler fix the replacing the heater core.

http://www.partstrain.com/store/index.php?PN=2237&N=0&VN=4294967188+4294964052+4294963793+4294961887+4294967173&Nr=AND(universal:0)&props=Part:Accessory+Belt+Tensioner
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16 twin overhead cam

Take the part # of the old one and a parts dealer should beable to cross referance one for u. Hope this helps.

Check for the cooling fans working or not,also the thermostat,it can be stuck,and the coolant level maybe dropping and getting air in the system.

CLICK on the following LINK. It has the Timing Belt and Mark Diagrams you will need.

If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/2001/make/daewoo/model/nubira/2001_daewoo_nubira_timing_belt_diagram_marks.htm

your heat is not working becuase the coolant level is too low meaning your heater core is full of air. the reason your car overheated is because the water pump impeller splines are gone and you need to replace the water pump. it is driven by the timing belt so replace that too. and the tensioner. this is the number one cause of vw overheating, especially on a diesel. i have replaced about 50 water pumps on this engine because of this.

reprogramming computer on a daewoo nubria