Question about 2002 Nissan Altima
I have the same issue. I found that the plastic gear under the stearing wheel is stripped and it automatically rotates to the cold function. Seems like a simple fix but i went to nissan today and of course they want to sell me the whole heater box. its easily accessable to check it out. You can see where the cable comes from your hot/cold knob.
Posted on Jan 17, 2009
I had the same problem with my daughter's 2002 altima. The blower would not blow hot air. The mech. said I needed a new heat box. Thankfully, I got on line. There is a little white plastic gear that is supposted to turn when you switch from cool to hot. It must get stripped easily. Easy to find. look under the dash from drivers side. Turn the hot/cool switch and you'll see it trying to move. You can manually turn it but when you turn the car off it automatically switches back to cold. The nissan guy was very nice. He only had to order the plastic gear. ($8.00). But, I did have to pay to have it put on the car. Some could easily do it themselves. Much better than buying a heat box (400.00 dollars) hope this helps
Posted on Mar 23, 2009
I had same probelm it was the litte gear in the back where the cable go;s not closing the vent i bet the air works fine check it out at the dealer i bought the gear for $11.00 dollars pout it in myself
Posted on Jun 02, 2009
If the heat only works while you are giving the car gas, then you most likely need a new heater core and a good flush of the system, Although I have had it fixed 2 times and i am now going on my 3rd time I am not paying for a things because luckily it is being covered - my advise DONT EVER BUY A NISSAN again - i have MORE problems with it then you can believe - and i WILL NOT pay for them to be fixed - I am going to wait until Nissan owns up to it after reading several websites and seeing I am not the only owner that has the same issues...
Posted on Jan 17, 2009
Same problem - I have a 2003 nissan altima and the heat only gets hot when I am driving. If I am parked the air comes out cold. My husband think it is the thermsalt also.
Posted on Feb 15, 2010
If problem occurs only @ idle check coolant level (cold). If low inspect for external leaks. If no leaks found you most likely have a slow head gasket leak into one or more cylinders. This is a very common indecent for Altimas and usually the first signs are low heat @ idle followed by misfire when started after cold soak (over night) then overheating problems.
Posted on Aug 27, 2014
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Posted on Jan 02, 2017
Have you tried asking them to just flush the system, as well as reverse flush? Sometimes that will clean it out enough to get you where it needs to be for now. If not, I'd try that, at another shop, obviously, if for no other reason, a second opinion. Try one that specializes in radiators if there is one in your area. If no luck, and your handy at all, I can tell you what I did to clean core out a few times that worked pretty well for me, and only cost me about $20-$30, and a little time. Let me know if your up to it, but I'd gamble the cost of a flush, and my method, before I'd pay $100's of dollars for new core.
Posted on Dec 22, 2009
only it you is employed at the number 4 for which you have the fan bad control amplifer this one serves for the control of the speeds and eta located behind lower right side of dash. Thanks
Posted on Jan 03, 2010
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