Question about Cars & Trucks
Renault megane 2000, was over heating so took out thermostat, put in hot water nothing seemed wrong with it, so put back on topped up with water and a bit of ready mixed antifreeze, switched on never heated, until the morning blew out cold air but steam coming from the water bottle and gauge went straight to the red, should i add the rest of the ready mixed anti freeze as only added about a quarter of a litre bottle? i am a woman so simple terms please!
I would install a new thermostat. The only way to check a thermostat is to heat it up in a pot of water on the stove and make sure it opens and closes. Make sure it's in the right way, and make sure the radiator is full. You may have to loosen a heater hose to get the air out of the system. I usually let them warm up with the cap off to make sure it's all "burped" out. Once you have everything full if it still overheats, you may have a water pump problem. Squeeze your rad hose right shut if you can. When you release it, you should feel a gush of coolant go through it. If you don't, your water pump may be no good, and will have to be replaced.
Posted on Jan 17, 2013
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Posted on Jan 02, 2017
if you are sure that your heater core is not restricted. then try to recalibrate the climate control panel. if your a/c system is not working then DO NOT ATTEMPT THE RECALIBRATION it will make your lights on climate control panel flash codes forever.
to reclaibrate the climate control panel just have the engine running. turn the mode to vent, the temp to cold, the blower on high, then press and hold the rear wiper wash and wiper buttons at the same time until the panel lights up then wait about 2 minutes for it to run completly when completed. turn off ignition and then restart the engine try to se if you have heat again. if it doesntwork post the codes it gives you after the calibration test.
Posted on Jan 15, 2009
SOURCE: heater blowing cold air
My 2005 Nissan Sentra 1.8s with 55,000 mi. blows cold air from the heater. Coolant not circulating in engine. Lower hose stays cool to touch. Both heater hoses cold. Changed thermostat - didn't fix it. Coolant not leaking or dirty. None in oil - no oil in radiator. Changed worn water pump belt - pump spins freely with no noise or resistance. Cooling fans come on after warm-up. Temperature gauge stays in normal range then jumps to hot and back again. Coolant good to 10 below - didn't freeze here yet. No other problems or repairs to car. Afraid to drive and make worse. Help!
Posted on Oct 16, 2009
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