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Dodge Ram Heater Not Working?

I have a 2003 Dodge Ram 1500. The only thing that works is the blower. There is no heat, no AC and it won't switch from defrost. I checked the fuses and tried two different control switches.

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Gold Post Medal for All Time! 677 Posts
December 21, 20180 found this helpful

You may have a bad blender door actuator.

 

Bronze Feedback Medal for All Time! 196 Feedbacks
December 21, 20180 found this helpful

Maybe something in this link can help:

www.cargurus.com/.../Discussion-t21939_ds615899

There are YouTube videos that may also help like this one could get you started:

www.youtube.com/watch?v=EpNSHzHa4G84

If you are not handy, you may want to call the dealer or your mechanic! I have found the older the vehicle, the worse DIY projects turn out, but that is just me and my bad luck!

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October 20, 20190 found this helpful

I have a 2000 Dodge RAM van with a 3.9L. It was not warming up inside after driving 10 miles. Water temp was 190-200 degrees. I watched a YouTube video and learned that Dodge put the same size radiator on the different engine sizes therefore the small engines were over-cooling the coolant going to the heater core. I blocked off the hose going into the water pump, installed a T on my radiator hose and ran the flow that was going to the water pump back thru the radiator hose. Instant Heat.

 

Gold Feedback Medal for All Time! 949 Feedbacks
December 22, 20180 found this helpful

It may just be that your hose has come loose but I would suggest you take your Dodge to a local auto parts store (or maybe more than one?) (Auto Zone, NAPA, Advance Auto, Pep Boys) and ask them if they can help you locate the problem.

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Many times there is someone that knows about a problem and can assist you - if not at one - go to the next. I have always had very good luck and good information from all of these stores.

 

Diamond Post Medal for All Time! 1,298 Posts
December 22, 20180 found this helpful

Could be the blend door in the a/c (Heater core box)

Common issue and lots about this on YouTube and here are other solutions that can be possible for your solution:

www.thriftyfun.com/Dodge-Ram-Heater-Not-Working.html

 

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