Question about 2003 Nissan Altima
THERMOSTAT OK ANTIFREEZ GOOD BLOWER BLOWS OUT AIR BUT HAS ON HEAT CHECKED VACUM HOSES OK
You may need ot do a cooling system flush, go buy a bottle of radiator flush, put it in the radiator when it is cold, run the car for about 15 mins, and go up to the car wash and take the upper rad hose off, and use the power washer to push all of the gunk and anti-freeze through the system. do it until it runs clean.... let the car run for 2 mins with the hose off after flushing and buy straight antifreeze, not 50/50. add it to the radiator, you should have heat.....
If this does not work, then your control unit in your dash may be bad....
Posted on Nov 26, 2008
I've experience the same however after replacing
the thremostat,control valve & the tempt. switch didn't fix the problem. After that there is a in-cabin micro filter located behind the glove box. I remove the glove box to access the filter cover & decovered the it was clog up with dirt, pollen & dust.It states that it should be replace evey year or 30,000 mile. However it was never done on my wife vehicle. After removing the filter I had heat. That should fix your problem. I'm a 100% sure.
Posted on Dec 31, 2008
Even tho we're in 2010, i finally found what the heating issue is for altimas well at least the 2003. After being told by many mechanics that they couldn't find the actual issue, that they would have to de-assemble anything,,, those bast**ds THE ISSUE IS SIMPLY A FUSE TO REPLACE FOR 10 BUCKS and yes i had tried everything before antifreeze checkede radiator checked as well. yah previous years i was having same symtoms such as no heat in idle its actually the fuse thats dying and by the way i live in Montreal, Quebec in Canada and we have cold winters as f**k
Posted on Dec 18, 2010
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Posted on Jan 02, 2017
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