Question about 2004 Nissan Armada
Hello! There is a Technical Service Bulletin TSB # NTB07-017 which calls for the replacement of the Heating and Cooling unit...I would suggest having the dealer inspect the unit when you bring their attention to this Bulletin #...There are several reasons that you do not have heat...Blocked heater core...Defective door controls...Or simply a bad thermostat...When the engine reaches operating temperature is the upper radiator hose hot an hard?...With the heat control turned to high are both heater hoses hot?...This would eliminate the thermostat and a blocked core if the answer to both questions is yes...That leaves the heat/cooling control unit and a trip to the dealer with the TSB # is in order...Guru...saailer
Posted on Feb 14, 2012
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Posted on Jan 02, 2017
I live in Alaska and have had the same problem i just added more coolent to the radiator and it warmed up i installed a block heater and i leaked a bit and the coolent level got low and i would have no heat. I tryed to fill just the coolent resivoir and that dident work so i filled the radiator pumb full and that worked!! Hope this helps.
Posted on Jan 18, 2009
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
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Posted on Feb 24, 2009
No matter how much you don't think this happens but when your heater is on the a/c also goes because it act's like a dehumidifier so in the winter when you crank the heat it takes the moisture out of the air to make things heat up faster, There will be a relay switch on the other side of the fire wall inside the cab that will either have a seperate fuse that you will need to change or you just have no connection to your switches on your dash. either way the best way to check it would be to take a volt/amp meter and check all your connections in your fuse box.
Posted on Sep 18, 2009
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