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Heating & Cooling 2nd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #11  
Old 10-26-2010, 06:35 PM
Topdown Topdown is offline
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no problem, I will check tonight when I get home.

I do know that after a 5 mile drive through town, on an engine that was already warm from a previous drive, hitting a couple stop lights and a couple stop signs, that the TOP radiator hose was not uncomfortable to touch... which seems odd to me as this is the hose that should be the hottest coming out of the engine.

I have not taken the time to get a reading on the temp coming out of the vents, at low after the 5-mile trip, the temp out the vents is luke-warm, nowhere near 140*.

also, the heater hose on the left of the engine was warmer than the hose on the right side of the engine (while facing the front of the truck), slightly... (could have been mentally cooler versus actually - I will check that tonight too) though neither were uncomfortably warm, definitely neither were warmer than the radiator hose.

yeah, its raining like mad and is 54* outside today... so while I am not excited about heading out to check, I need heat in the truck.

Oh, one other small note, the longer I drive the truck, the warmer the heater gets - again, it seems like its just not getting hot and my darn water-temp gauge is either bad or the engine is just never getting hot enough to register on the gauge (which starts at 130)
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Last edited by Topdown; 10-26-2010 at 06:37 PM.
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  #12  
Old 10-26-2010, 07:38 PM
Dtimekw Dtimekw is offline
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OK, I've checked the following on my truck which is basically a stock 5.9. With the heat on hi and full hot setting I get:

- Both heater core hoses are too hot to keep touching for more than a couple of seconds. The passenger side (goes to intake) is noticably hotter than driver side (goes to w/p).
- Upper Rad hose is hot but can keep my hands on it, lower is noticably cooler.
- Rad water temp taken at the rad neck with a cooking thermometer is ~170*
- The guage in the cab shows just under 1/2 and partially covering the "2" in 210.

It is starting to sound like a stuck t-stat from what you are describing. I would compare against what I found on my truck and if you find cooler temps (vent air, hoses, guage, water temp at rad neck) then I would suggest something cheap like replacing the t-stat and going from there. Who knows, the stat might not be in there (like the old Chevy's in So Fla). Let me know if I can make any more checks for you. I've been to your location and you NEED heat!

Troy
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  #13  
Old 10-31-2010, 04:36 PM
Topdown Topdown is offline
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I finally had a chance to work on the Ram yesterday. thinking that it was a thermostat issue, thats what I went after first. Sure enough, the T-stat was a failsafe and had been stuck open.

I replaced it with another failsafe (I prefer them to fail open versus fail closed) and like magic, the temp gauge started working (though it didnt get very high, just to the line over 130* - but most importantly, the heater got nice and hot while at full-speed.

Thanks for all the input/help everyone... I appreciate it!

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  #14  
Old 11-01-2010, 12:36 AM
Dtimekw Dtimekw is offline
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Great news! Glad to hear things are heating up for you!! Appreciate you letting everyone know what the final outcome was. Stay warm!

Troy
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  #15  
Old 11-01-2010, 01:32 AM
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Dennyboy Dennyboy is offline
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where is the blend door on these?
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