No Heat...Fixed - Nissan Titan Forum
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#1 (permalink) Old 10-01-2011, 02:26 PM
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No Heat...Fixed

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, RAS, WeatherTech Floor Mats...more to come

Last edited by tywinter; 10-01-2011 at 02:30 PM.
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#2 (permalink) Old 11-07-2011, 09:26 AM
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Talking Re: No Heat...Fixed

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.
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#3 (permalink) Old 11-07-2011, 09:35 AM
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Re: No Heat...Fixed

the only impact would be less A/C cooling ability next summer. that valve stops the flow of fluid through the heater core.


Ever growing mod list here

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#4 (permalink) Old 11-07-2011, 10:12 AM
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Re: No Heat...Fixed

Scribin'.........
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#5 (permalink) Old 11-07-2011, 11:21 AM
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Re: No Heat...Fixed

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

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#6 (permalink) Old 11-16-2011, 09:11 AM
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Re: No Heat...Fixed

Quote:
Originally Posted by beason View Post
the only impact would be less A/C cooling ability next summer. that valve stops the flow of fluid through the heater core.
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, RAS, WeatherTech Floor Mats...more to come
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#7 (permalink) Old 01-05-2012, 09:20 AM
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Re: No Heat...Fixed

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.

Thanks
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#8 (permalink) Old 01-07-2012, 03:01 AM
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Question Re: No Heat...Fixed

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?
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#9 (permalink) Old 01-19-2012, 06:14 PM
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Re: No Heat...Fixed

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!
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#10 (permalink) Old 01-20-2012, 06:54 AM
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Re: No Heat...Fixed

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.
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#11 (permalink) Old 09-10-2012, 02:01 PM
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Re: No Heat...Fixed

Just fixed my heat with the help of this thread
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#12 (permalink) Old 12-01-2012, 06:46 PM
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Re: No Heat...Fixed

Well lets see , tommorow Im going to hopefully fix my heater issue with this wonderful thread thanks for the OP!

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#13 (permalink) Old 01-05-2013, 03:55 PM
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Re: No Heat...Fixed

Thanks to this thread, my hear now works. Took the shaft out.

Thanks!

2008 LE Crew Cab Ext bed



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#14 (permalink) Old 01-21-2013, 05:50 AM
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Re: No Heat...Fixed

Thanks guy. Just had to do the same to get heat in the 08. Will start looking for the replacement part now.
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#15 (permalink) Old 01-21-2013, 09:47 AM
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Re: No Heat...Fixed

Quote:
Originally Posted by ONETINSOLDIER View Post
Thanks guy. Just had to do the same to get heat in the 08. Will start looking for the replacement part now.
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, RAS, WeatherTech Floor Mats...more to come
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