When my heat kicks in, it is not very hot...It blows out almost cold air, I dont know what this might be, or what I can do to fix it...Any help would be great...and if possible a price of what this wikll cost to fix....
Also, I think I need a new O2 sensor b/c I get like 250 gallons to a tank....would this be the problem with the heat also ???
Thanks ALot and Happy Thanksgiving ( a day late )

 

it could be your thermostat.. that's a $15 part, but the labor to install I'm not sure on.. some cars, it's a 10 min job.. others, it's a 5 hr job.. I've never done one on a max, so I can't tell ya.

 

I dunno, Matt. I just priced a thermostat at 2 local parts stores and they said $30 for the SE's. Didn't ask about the GXE's because that price alone was enuff to make me run in the opposite direction. But anyway, I think I posted this a couple of days ago about Max's with no heat:

1) Make sure the coolant system is full. Air pockets will detract from heater performance.

2) Make sure the thermostat is working. Does the temperature gauge show a normal reading? Does the upper radiator hose get really hot? A stuck-open thermostat may prevent the engine from reaching normal operating
temperature. This will detract from heater performance.

3) Check the air mix door and its control mechanism. The mix door blends cool outdoor air with heated air. If the mix door is in the 100% outdoor air position you will get no heat, even though the heater core may be hot.

4) Your Maxima may be equipped with a Water Control Valve. This valve controls the flow of engine coolant through the heater core. Its purpose is to keep the heater core cool while the A/C is running. It may be
operated by a steel wire control cable or by engine vacuum gated by a solenoid valve. If the Water Control Valve is closed you will not get any heat even though the engine is hot. See the Haynes '93-'99 Maxima manual, photo 11.7 on page 3-10 or the Chilton '93-'98 Maxima manual, Figure 18,
page 6-9. You may purchase these manuals at any large bookstore or auto parts store. You may find them on the shelf at your public library.

Hope this helps, guy/gal.

 

youd know it if it wuz your o2 sensor a messed up one would like knock u down too 18 miles per gallon...if it is that get it checked out cuz leaving that messed up can couse emissions problems and damage your catalytic converter

 

My car did the same thing when i bought it. The problem
was the thermostat it is not too expensive and is
relatively easy to install it is located on the front of
the engine and you can see it if you look for the U
shaped hose.