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
MagnaFlow 12568 w/Dual 2 1/2"s Out Passenger Side, 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