Question about 2002 Nissan Sentra
2005 nissan sentra blowing cold air. No leaks on floorboard, coolant level is ok and is clean, the air seems to have no heat at all in it. No indication of air pockets in system and no indication of engine overheating
Just started looking into this. the heater blew some slightly warm air this morning on and off. My wife said the water temp guage was slightly cooler than normal.
I added a little bit of coolant last night, maybe 1/2 gallon. It still goes up to the top of the normal range of the temp guage, but not beyond. Then it goes back to just below normal.
I wonder if the thermostat went bad, and then the computer detected it and shut off the hot water to the heater core? After reading some of these questions I think the computer is involved somehow.
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
I am a nissan tech. The sentra and altima can be hard to burp all of the air from the cooling system. Depending on what engine that you have in the car, some of those nissans also have a water valve besides the main thermostat. They are very temperamental that there is a 50/50 coolant water mix. There is also a lot of head gasket issues that we have seen on those engines
Posted on Jan 29, 2015
Just simply change the thermostat....I had the same problem and this is what I did and now it's hot as hell.
Posted on Dec 23, 2008
My 98 nissan altima gxe hhas had this same problem and I have already replaced the thermostat but the water still isnt circulating and heater did work until the car overheated...There is no indiction that the water pump is bad...The temperature gauge stays on normal but the car is overheating
Posted on Jan 29, 2015
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