I have 1994 nissan altima, and the heat is not working. turn on but no heat. I changed the heat control valve but still the same. I did notice that hose connected the thermostate is cold all the time even the car been running for a while. anyone know the the problem is? thanks

Replacing fuel pump on a 1996 Nissan Altima - YouTube

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https://www.youtube.com/watch?v=nnCmk9ZAr28
Mar 23, 2014 - Uploaded by Shogun Bug
Replacing fuel pump on a 1996 Nissan Altima ... I got the pump out and put the new fuel pump in but now my ...

Check to see if blower is working by running 12v to it. If that works check if your heat/ac controls are working by looking at the area where the flaps are and turning the knobs/buttons. You should hear the flaps move or see the pins of the flaps turn. See if your heater core is working. Should be hot as coolant from engine passes through it.

I suggest replacing your MODULATOR VALVE on the transmission. This valve, under pressure from the engine, controls how the vehicle shifts. It is possible that the valve is good, and you just have a leak in the rubber hose that connects to the valve. I have not heard any issues from the 02' Nissan Altima about the transmission. If the valve is disconnected from the hose, you should notice some smoke either from the transmission, or under the hood by the exhaust.(NOT ALWAYS NOTICEABLE) Second, the automatic transmission has several internal components, that if one fails, can cause a cascade of issues. The TORQUE CONVERTER under cyntrifical force, converts the power from your engine, into a hydrolic pump that feeds the transmission. If this becomes clogged, the transmission will not shift correctly. A transmission flush might cure your shifting issue. During the flush, replace the transmission filter. As if his is clogged for any reason, it will not supply enough fluid to the transmission, and could cause permanent damage to the transmission.I hope this helps. Good luck.

check fuel filter,or fuel injectors, fuel pressure regulator.Also check fuel filler cap.Check exhaust system for plugged catalytic converter,muffler,bent exhaust pipes,etc.

remove the ignition control module on top of mass air flow sensor,apply heat sink to transistor,and reinstall then change spark plugs, wires,distributor cap,and rotor,remove air intake,and clean out throttle body port with carbon cleaner,check ignition coil for lump(defective) and check pcv valve to see if it's stuck wich is located on a breather seperator on top of the idle air control valve......also,check 75 amp fusible link for battery under hood on drivers side...........in the same compartment,look for the 10 amp fuse to the alternator..........follow these instructions,and your car will run excellent.....nissan altima master 1993-1997 10 years owning a 1994 altima............been there done that.................it does not get any better than that trust me..........total money to spend should be about $120.00 dollars...........peace..........

:) before junking it, have the codes read, (OBD) you probably find that the car is throwing a code that says the Idle control valve sensor is faulty , which would make the car idle higher, and want to move the car

it sounds like you either have a vacuum leak, or the idle air control valve is dirty.

http://www.youtube.com/watch?v=eQpPcdvSBks

thermostat might be stuck open need to replace it ..just went through that with my car

take to dealership , that also is a recall problem with alot of altimas , they need to flush system and check water valve , got mine fixed working great ever since , never hesitate to ask dealership about recalls , they have to fix for free

change the bulbs, if they are good, make sure the wires are not cut or dried out.....

did you check all of your fuses?