I found that my heat isn’t working, work perfect last winter.
Water valve or control valve (whatever you call it) is junk. Made of all plastic.
I found it here. Against the firewall and easy to reach.
Opened it up, turned the heat on and it did nothing. I touched it and the gears began to turn. Did this a couple times to «loosen it up».
Took it for a test drive. turned the heat off and on several times and it died again.
So I manually opened it by removing the shaft and turning the top gear counter clockwise.
I put it all together, minus the shaft piece. And there you have it just save $$$$.
This will go in the glove box for future use.
2008 Titan Majestic Blue Pro-4X Crew Cab with Big Tow
Air Box Mod with K&N Drop In, OEM Nerf Bars (Chrome),Screen Window Mod, Extang Trifecta Folding Tonneau, Leer Cap, 5100’s (all around), RAS, WeatherTech Floor Mats, BFG KO2’s, 3″ Cat Back. more to come
1 příspěvek · Připojeno 2011
Holy crap — that worked awesome!! 2008 Titan LE lost heat last week — read your post, thankfully before calling dealer, and within 30 min heat was working.
Question though — I too left the post out as it does not seem to affect heating cooling operations — what is the impact of leaving it out?
Thanks in advance and huge thanks for making me my wife’s hero and saving a couple Ben Francklin’s for sure.
16586 příspěvků · Připojeno 2009
the only impact would be less A/C cooling ability next summer. that valve stops the flow of fluid through the heater core.
WhinyWhore™ SoggyWhore™
Majestátní Bastard
tywinter Discussion starter
840 příspěvků · Připojeno 2008
What beason said. efficiancy when cooling is lost (a little).
2008 Titan Majestic Blue Pro-4X Crew Cab with Big Tow
Air Box Mod with K&N Drop In, OEM Nerf Bars (Chrome),Screen Window Mod, Extang Trifecta Folding Tonneau, Leer Cap, 5100’s (all around), RAS, WeatherTech Floor Mats, BFG KO2’s, 3″ Cat Back. more to come
3571 příspěvků · Připojeno 2006
811 příspěvků · Připojeno 2008
Same thing on mine and I fixed it last week. About may of next year I will turn it shut so I will have max AC. Then in Sept I will open her up again. I will do this forever or until one of these new parts falls in my lap. LOL
OLD 05 KC 2wd Galaxy Black
New 08 Pro4X CC LWB Galaxy Black
PlastiDip wheels
Bedliner cowl
Bedliner step bars
DIY Grille
DIY Back Window Screen
RAS
Extang Tuff Toneau Cover
JB Bright Arse Back UP Lights
R1 Concept Slotted Rotors with Hawk LTS Pads
6 příspěvků · Připojeno 2012
Hey guys last Friday I bought an 06 Titan with 60,000. Of course it was typical afternoon. Checked the AC ran like a top. Of course 1st time I tried to use the heat I get cold air.
Been looking at these heat related topics for a few days. I tried this fix does not appear to be working. Still blowing cold air.
Anyone ever had any luck getting Nissan to fix this out of warranty? Seems like kind of a bad deal for Nissan.
10 příspěvků · Připojeno 2011
Just wanted to say thanks for the post. Helped me fix the same issue.
Drove my truck to work this morning — heat was working fine. Drove home — no heat, brrrrr. Checked fuses, relays, and the front control panel connections (did some audio work a day before), everything seemed fine.
After doing some research, found this post that describes the valve. And sure enough after pulling the plastic shaft and moving the top gear back and forth a few times and reinserting the shaft things started to work again.
I’m just glad that valve was easy to access and didn’t require pulling half the console apart or something like that.
My concern tho is that when I opened up the cover for this valve I had about a third or even half cup of coolant/refrigerant spill out. Is it normal for it to leak into the gear enclosure? Could it be contributing to the failure of this component?
74 příspěvků · Připojeno 2012
I just purchased a 2006 SE, no heat. Took the cover off of that doohickey and the shaft just fell out. I turned that gear all the way left and boom, heat. Thanks!
2006 SEKC4X4
6 příspěvků · Připojeno 2012
Guys I have been meaning to take my truck to a dealership to get it looked at. I had planned on putting the little shaft part back in place before doing so. But I was driving down the road the other day and lost all my Transmission fluid so I took it into a dealership up the rd. It ended up being my coolant line.
I asked them to check out my heater and showed the service writer the shaft, and put it in the cup holder in the center console.
They diagnosed the problem as the heat pump hose assembly. From what I gather it is the little box that I took the shaft out of.
Question: Did they diagnose that as bad because I had the shaft out? I doubt the service writer actually showed the tech. I can change that out I am sure just do not want to do it if it is a bad diagnosis.
18 příspěvků · Připojeno 2010
Just fixed my heat with the help of this thread
82 příspěvků · Připojeno 2011
Well lets see , tommorow Im going to hopefully fix my heater issue with this wonderful thread thanks for the OP!
19 příspěvků · Připojeno 2012
Thanks to this thread, my hear now works. Took the shaft out.
2008 LE Crew Cab Ext bed
3 příspěvků · Připojeno 2005
Thanks guy. Just had to do the same to get heat in the 08. Will start looking for the replacement part now.
tywinter Discussion starter
840 příspěvků · Připojeno 2008
Let us know if you find the correct part number for the assembly and how much it runs. I too have an 08 and one day may decide to replace it.
2008 Titan Majestic Blue Pro-4X Crew Cab with Big Tow
Air Box Mod with K&N Drop In, OEM Nerf Bars (Chrome),Screen Window Mod, Extang Trifecta Folding Tonneau, Leer Cap, 5100’s (all around), RAS, WeatherTech Floor Mats, BFG KO2’s, 3″ Cat Back. more to come
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725 příspěvků · Připojeno 2006
did you re-grease any of it at all? i gotta tinker with mine later.
2007 Titan LE
CC, OR, BT, DVD
Galaxy Black, Graphite/Titanium
Rancho 4″ Lift
20″ Raceline Octane Wheels/35″ Nitto Ridge Graps
17″ Stock Offroad Wheels/Goodyear Duratracs
Airaid 4″ CAI
Meyer 7.5′ Super-V LD Snow Plow
tywinter Discussion starter
840 příspěvků · Připojeno 2008
I tried several things with mine. The little motor is simply failing.
I should replace it but continue to put it off and usually forget that it’s in a perminent open position.
2008 Titan Majestic Blue Pro-4X Crew Cab with Big Tow
Air Box Mod with K&N Drop In, OEM Nerf Bars (Chrome),Screen Window Mod, Extang Trifecta Folding Tonneau, Leer Cap, 5100’s (all around), RAS, WeatherTech Floor Mats, BFG KO2’s, 3″ Cat Back. more to come
725 příspěvků · Připojeno 2006
rotating the knob didn’t work for me. left or right, same thing. cool air unless i’m accellerating. radiator is full, coolant overflow res. is just below min.
2007 Titan LE
CC, OR, BT, DVD
Galaxy Black, Graphite/Titanium
Rancho 4″ Lift
20″ Raceline Octane Wheels/35″ Nitto Ridge Graps
17″ Stock Offroad Wheels/Goodyear Duratracs
Airaid 4″ CAI
Meyer 7.5′ Super-V LD Snow Plow
350 příspěvků · Připojeno 2012
Could be the heat mix actuator (common failure) is acting up/broke OR the arm that it connects to it broken/snapped.
This particular actuator is located on top of the HVAC box, sort of behind the dash, in the glovebox area. There is no way in hell to remove/replace it without pulling the entire unit out (that I could find by inspection). That would require removal, etc, etc. Roughly a $1,000 job if it is JUST the actuator. If the mix valve arm (little plastic «arm») itself is broken, you would probably be looking at a new HVAC «box». I think that is in the $800 range itself.
Do you hear any clinking after adjusting the heat/cold control? If so, it points to the actuator.
Also, you can pull the glovebox and get your hand up in there to touch the actuator. I would cycle it from cold to hot and see if it is moving at all. If not, either the actuator is dead or it is not receiving a signal (bad control unit possibly).
I would first check actuator operation and go from there.
Three of my four actuators «click» several times after adjusting that setting (ie: going from cold to hot or floor to vent). My recirc/fresh actuator is dead/non-responsive. I am probably looking at pulling the entire unit out to replace two of them. The other two can be reached without such drama.
Good luck. In much research, I found that the actuators are very common failures.
2006 SE CC 4wd — Airaid MXP, BDGT performance 2*, WOT restriction removed, Spyders w/6000k Hi/Lo/Fog, Interior/Exterior LED’s, Aries Steps, Trutrac, PML pans, PRG tranny mount, 5100’s, DK lowering shackles to level, TAP Y-Pipe w/ BaMuffler, etc.
Switched Lead HomeLink
Always looking for other mods.
