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


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  #1  
Old 12-01-2010, 11:26 PM
danielstarr danielstarr is offline
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Default Heater quit working right when it gets cold!

1997 Dodge Ram Pickup. Heater went out in it the other day. All it does is blow cold air and on top of that, the thermometor barely shows it warming up if it does at all. I'm not even sure if its working properly. I topped it off with antifreeze today and after driving around for a little bit, it still never warmed up. Two people tell me it could be the thermostat and others say its the heater control valve or heater core. And do I have to take off the entire dash just to get to the valve and core??? Please help. The A/C and Heater is the only thing i know nothing about.
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Old 12-02-2010, 12:08 AM
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My guess is the heater core. If your truck is warming up to running temperature, but you're not getting any heat into the cab, then most likely scenario is a heater core issue. If the truck temp isn't warming up, then I'd lean more towards a thermostat problem.
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Old 12-02-2010, 12:16 AM
RootBeer RootBeer is offline
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Quote:
Originally Posted by danielstarr View Post
All it does is blow cold air and on top of that, the thermometor barely shows it warming up if it does at all. And do I have to take off the entire dash just to get to the valve and core??? Please help. The A/C and Heater is the only thing i know nothing about.
The temp guage not showing operating temp leads me to believe its the thermostat. Do a complete flush and fill when you change the t-stat.

Yes, to change the core you have to take apart the dash.
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Old 12-02-2010, 02:25 AM
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run your truck for a while, like going to or from work, feel the top radiator hose, if its hot, then its not likely the thermostat, then feel the hoses going to & from the heater, it may be the Heater Valve Control Valve is not opening & allowing the water to enter the heater, its usually located in the hose that goes from the water pump to the heater core, if it doesn't open & close properly, that is your problem.
it looks something like this
http://www.bouchillonperformance.com/BPEheaterValve.asp
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Last edited by GTyankee; 12-02-2010 at 02:28 AM.
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