I have a 2005 nissan pathfinder. I have only had it 2 months and just now starting to use the heat.when you have it on hi it only blows cool air but when its off or on low warm air comes out. the controls are hard to figure out so im i doing something wrong or is something wrong with the heater?
Heater matrix blocked
SOURCE: Heater blowing cold on 2005 Nissan Xterra
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.
SOURCE: Nissan Altima no cool air blowing or hot air blowing
Hi!
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.
Please
press the Blue button to appraise my FREE Efforts, Thank You!
Paul
'W' U.K
SOURCE: nissan dealer claims they replaced the heater pump
Yes, your Nissan Pathfinder has a heater pump. The heater pump circulates the hot coolant from your engine to your heater core(s). You have two heater cores if you have rear temperature controls. My guess is that your problem was that you had very little heat or no heat at idle. Attached is the page from the service manual on how to replace it.
SOURCE: Heater is blowing cold air. Could it be that my
Had similar problem. The actuator that opens & closes the air blend door quit working. This is easy to see if you remove glove box. The actuator will move when you adjust the temp selector (do this while the heater is running).
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