Originally Posted by SmokeMaximus

It supposed to do that. The auto function waites untill the car gets hot so it wont just blow cold air on you. Neat function heh!

Originally Posted by lilmyth

When I go to warm my car up in the mornings, I usually let it warm for 5-7 minutes, heat turned up to 85 degrees, seats and sterring wheel heated as well.. Everything seems to heat up except the inside.. the seats and the steering heat fine. My car doesn't seem to blow any hot air until I'm driving... On top of that, if I stop at a light or in a line say for example Wendys, the heat flow will die and it feels like the A/C is on...

Any ideas, suggestions.. am I the only one this happens to?

Thanks for any insight...

Originally Posted by bluemaxx

You may have air in the cooling system. There is a TSB for that.
At low RPM the circulation of coolant through the heater core slows down and air in the system migrates to the heater core. (heater core is the highest point of the cooling system)
The cooling system may just need to be burped.

Originally Posted by Mracura

Okay so how do you burped the cooling system?

Originally Posted by Maxima FSM

REFILLING ENGINE COOLANT
1. Install the radiator drain plug. If the cooling system was drained completely, install the reservoir tank and
the cylinder block drain plugs.

The radiator must be completely empty of coolant and water.

Apply sealant to the threads of the cylinder block drain plugs. Use Genuine
2. If disconnected, reattach the upper radiator hose at the engine side.
3. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with
the engine OFF as necessary to activate the heater mode.
4. Install the Tool by installing the radiator cap adapter onto the
radiator neck opening. Then attach the gauge body assembly
with the refill tube and the venturi assembly to the radiator cap
adapter.
5. Insert the refill hose into the coolant mixture container that is
placed at floor level. Make sure the ball valve is in the closed
position.

Use Genuine NISSAN Long Life Anti-Freeze Coolant or
equivalent, mixed 50/50 with distilled water or demineralized
water.
Refer to MA-11, "ANTI-FREEZE COOLANT MIXTURE
RATIO" .
6. Install an air hose to the venturi assembly, the air pressure must
be within specification.
CAUTION:
The compressed air supply must be equipped with an air dryer.
7. The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open
the ball valve on the refill hose slightly. Coolant will be visible rising in the refill hose. Once the refill hose is
full of coolant, close the ball valve. This will purge any air trapped in the refill hose.
8. Continue to draw the vacuum until the gauge reaches 28 inches
of vacuum. The gauge may not reach 28 inches in high altitude
locations, refer to the vacuum specifications based on the altitude
above sea level.
9. When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds
to see if the system loses any vacuum. If the vacuum level drops, perform any necessary repairs to the
system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for any leaks.
10. Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then
open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling
system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling, to avoid air from being drawn into
the cooling system.
11. Remove the Tool from the radiator neck opening.

Originally Posted by BadBlackMaxSL

My Max warms up properly but my Pathfinder LE exhibits the same heating problems. I have 2 small children and on those really cold days (below 20 degrees) I don't want them to have to sit in the cold car, especially on the cold leather so I warm it up for them. The Pathfinder's engine gauge will read the engine is warmed to normal operating temps but it still blows cold air. I put the Pathfinder in reverse and back out of the garage and whamo, we have hot air blowing... I don't get it.

Originally Posted by pathfinder FSM

—REFILLING ENGINE COOLANT—
NAMA0050S02
1. Install reservoir tank if removed, and radiator drain plug.
2. Close and tighten cylinder block drain plugs securely if
removed.
I Apply sealant to the thread of cylinder block drain plugs.
: 7.8 - 11.8 N·m (0.8 - 1.2 kg-m, 69 - 104 in-lb) Front
side
: 17.6 - 21.6 N·m (1.8 - 2.2 kg-m, 13 - 15 ft-lb) Right
side
Use Genuine Thread Sealant or equivalent. Refer to GI-53.
3. Fill radiator slowly with coolant.
If air relief plug was removed, fill until coolant spills from the
air relief plug, then install air relief plug.
4. Fill reservoir tank if removed with coolant up to the MAX level
and install radiator cap.
Use Genuine Nissan Long Life Antifreeze/Coolant or equivalent
mixed with demineralized water/distilled water.
For coolant mixture ratio, refer to “RECOMMENDED FLUIDS AND
LUBRICANTS”, MA-13.
Coolant capacity (Without reservoir tank):
8.6  (9-1/8 US qt, 7-5/8 Imp qt)
Reservoir tank capacity (for MAX level):
0.6  (5/8 US qt, 1/2 Imp qt)
Pour coolant through coolant filler neck slowly to allow air in
system to escape.
5. Warm up engine to normal operating temperature with radiator
cap installed.
6. Run engine at 2,500 rpm for 10 seconds and return to idle
speed.
Repeat 2 or 3 times.
Watch coolant temperature gauge so as not to overheat the
engine.
7. Stop engine and cool it down.
Cool down using a fan to reduce the time.
8. Refill reservoir tank to Max line with coolant.
9. Repeat steps 5 through step 8 two or more times until coolant
level no longer drops.
10. Check cooling system for leaks with engine running.
11. Warm up engine, and check for sound of coolant flow while
running engine from idle up to 3,000 rpm with heater temperature
control set at several positions between COOL and HOT.
Sound may be noticeable at heater water ****.
12. If sound is heard, bleed air from cooling system by repeating
steps 5 through 8 until coolant level no longer drops.
Clean excess coolant from engine.