Question about 1999 Dodge Ram
Checked coolant, checked tubes to heater vary hot in and out, checked out side air intake and cab air flapper ( works with A/c) checked a/c and cab temp on dash with fan running engine running turned to a/c cold got cold turned to hot got a little warm, lot of air movement knob turned to defrost, some when moved to floor position did replaced thermostat 50/50 mix the one valve that has wires to it I could see movement when I moved the heat/a/c knob, this would also move the outside and cab air flapper I pulled the glove box out to get access to some of the heater assy
First thing I would do is flush the heater core with a 4 to 1 mixture of water and muratic acid. Put it in there and blow it out both ways 3 or 4 times. Let the acid mix set for about 10 minutes before blowing it out with air. This is a cheap fix, if it works. $7 and your time. Got to say though, it only works about 30% of the time. The other 70% is to remove the heater core. Dodges/Chrysler su(k. To get to the heater core, you have to drop the steering column, and remove the entire dash. Then remove the heater/A/C plenum to remove the heater core. Buy a manual to do this. Way to many hidden screws and bolts. This job costs about $800 at a garage. It takes about 8 hours to do, if you know what your doing.
Posted on Dec 07, 2014
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Posted on Jan 02, 2017
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