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Message: [QUOTE="6speedsd, post: 440479, member: 1242"] I assume this is a good place for this. Temps are starting to drop here at night. Been cool enough to run the heat early mornings. Anyways earlier this week truck started not blowing good hot air. It would blow kinda warm but not as hot as it should be. After doing some google searching I found that the blend door tends to be an issue in these trucks. But from what I can see if that breaks you don't get any heat at all. I am getting some heat most of the time. I call it luke warm. It's always like that in th morning when you need it the most. Sometimes I can cut the heat off, then turn it back on after 20 mins or so and it's blowing as hot ad it should. Was thinking maybe the valve in the heater hose was stuck shut or something. It moves freely in and out by hand. Tonight I went out and fooled with that valve some. It stays open all the time no matter whether the heat is on or off. I assume open anyways. The lever is out (towards the firewall). I pulled the vacuum line off but can't feel a vacuum like I should be able to. Vacuum pump is working. I'm confused here. I don't know what else to check. I figure if the heater core was clogged or on the fritz I wouldn't get heat at all. Just seems weird that sometimes it works great then others it blows semi warm air. Any ideas or things to check? Cold weather is coming before too long and I need good heat! [/QUOTE]

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