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How to flush the heater core on 2003 ram 2500

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
  • 76691 Answers

SOURCE: flush heater core

PULL THE HEATER HOSES OFF IN THE ENGINE BAY, THEN USE A GARDEN HOSE AND FLUSH THE CORE IN BOTH DIRECTIONS, IF U SEE NO RUSTY WATER OR THE WATER GOES RIGHT OUT THE OPPOSITE SIDE U ARE FLUSHING U DON'T HAVE A HEATER CORE PROBLEM

Posted on Mar 24, 2009

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  • 20 Answers

SOURCE: 2003 Dodge Ram 2500- window master switch

Alot of times these switches get water from the rain coming in intoo them causing the contacts to short or not make contact at all, unfortunately they are not servicable but you may want to try spraying some electrical cleaner into the switch working the button at the same time this may help

Posted on Jul 02, 2009

wilsodfarm
  • 986 Answers

SOURCE: how tro replace heater core in 2003 dodge Ram PU

dodge want $800 to$1000 for doing this and I can see why.You have to raise or remove the whole dash recover you a/c freon ,disconect your a/c lines and heater hoses remove your heater box and put on a work bench remove the top and remove heater core,now next the last one I did the new heater core will not fit you have to modify the box so your new heater core will fit,put it all back together and fill with coolant and charge a/c, man I got tirered just typing this much less doing it, I hope this helps

Posted on Oct 26, 2009

scott4169336
  • 103 Answers

SOURCE: How do I flush the heater core without removing on

use the flush for the cooling system first. see if that helps. if not pull the hoses from the motor and use 40psi to blow through it should clear blockage

Posted on Dec 06, 2009

wracefans24
  • 1985 Answers

SOURCE: 98 sable -no heat. changed thermostat, new

Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Posted on Jan 02, 2010

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1 Answer

How do you remove of bars leak sealant from a heater core


you can try running CLR into the heater core and let sit then flush the heater core out with water. you may have to repeat to get it cleaned out enough. the only other way is to have it pulled out of the truck and replaced. this is not a cheap job to do. you don`t say what the reason was for add it to the cooling system. this product is not suppose to do this there fore you might have a lot of debris blocking the core that is from the rest of the cooling system and the system may have to be professionally flushed out.



Feb 26, 2015 | 2003 Dodge Ram Pickup 2500

1 Answer

I have no heat inside my cab on a 2003 dodge ram 2500. heater core is not blocked


either you have a bad thermostat or you have a air lock in your heater hoses remember your heater is fed by the hose by the upper rad hose return is the hose going to the water pump, to bleed the air out fill rad leave the rad cap off start engine run for 5 min. the check the coolant level,fill to top of neck replace rad cap tight, K-D tools make a special funnel to solve this air lock problem

Aug 09, 2014 | 2003 Dodge Ram Pickup 2500

1 Answer

I have a 2003 dodge ram 2500 and i replaced the recir. door and the upper blend door and i still have very little heat inside. the heater core is clear, not cloged


check that the heater control is working and allowing water through the heater . Check that there is not an air lock in the cooling system that is preventing coolant flowing through the system.

Aug 09, 2014 | 2003 Dodge Ram Pickup 2500

1 Answer

1995 ram 1500


heater core is most likely the prob. its a long process to replace but can be done. replaced mine in my 99 ram 2500. remove steering column and entire dash to reveal heater core, passenger side floor area.

Nov 26, 2012 | 1999 Dodge Ram 2500 4WD

1 Answer

97 dodge ram 2500 v8 5.9 no heat flushed the system heat core is not plugged


heater cores have small bypases in them try using a blow gun with air unhook both line make sure there is water in it .try both ways.be careful not to slash your self or get it in your eyes .also you can get the truck to operating temperature check heater hoses to see if they're the same temp.
if not its clogged up

Oct 27, 2010 | 1997 Dodge Ram 2500 Club Cab

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Where is heater control valve on 2003 dodge ram pick up


THERE IS NO HEATER CONTROL VALVE ON THE WATER HOSES. NEW HEATER CORE. INLET LINE right before heater core hot, outlet after core look warm. Burped cooling system 5 times with engine at operating temp. Installed homade burp VALVE right after heater core outlet(high part of hose). Still no heat. Removed water pump, impeller still in good shape not stripped off shaft. Removed heater core hoses flushed water thrue the connections on the block to the water pump INLET and outlet. flushed water thrue heater core and hoses. Going to put it back togeter today. Used known good gauge to check water temp for operating temp in test. 195 f

Oct 22, 2010 | 1997 Dodge Ram 1500 Club Cab

1 Answer

I have a 2001 Dodge Ram 2500 and I need to replace the heater core.


If it's not leaking, you may want to check my tips re: heater core flushing.

Sep 24, 2010 | 2001 Dodge Ram 2500 Truck

1 Answer

2003 Dodge Ram 2500 Diesel. October I noticed


Replace heater hoses, Sometimes the inner lining of hose forms pockets that plugs flow of fluid.

Jan 13, 2010 | 2004 Dodge Ram 2500

1 Answer

No heat


You probably just need to backflush your heater core. You can use a hose to flush it back and then forward. You'll be surprised at how much sludge and gunk will come out.

Jan 21, 2009 | 2004 Dodge Ram 1500

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