No heat from heater?

Tiny
J FALK
  • MEMBER
  • 1999 DODGE DAKOTA
  • 200,000 MILES
Takes a long time to get luke warm air out of vents never hot if you rev engine and let it idle it gets warmer never constant I would like a place to start before I just start tearing things apart can I flush just the heater core? Are there certain vacuum hoses I can check? The thermostat has been replaced in the last 3 years thanks for your time in advance
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Saturday, December 17th, 2011 AT 1:37 PM

31 Replies

Tiny
HMAC300
  • EXPERT
Check to see if both heater hoses are hot first. If they are then you'll have to check your actuators on your heater unit to see if they are working, they can be either vacuum or electric. Check out this guide with the diagrams below.

https://www.2carpros.com/articles/car-heater-not-working

Check out the diagrams (Below). Please let us know what you find.
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Saturday, December 17th, 2011 AT 2:47 PM
Tiny
SLUSHPUPPY
  • MEMBER
  • 1999 DODGE DAKOTA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
I let my 1999 dodge dakota warm up for about twenty mins. Then ill start driving it and it will over heat and blow ice cold heat soo ill shut it off and let sit for ten minutes and then it will be all fine but look warm heat. So what should I do?
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Tuesday, December 1st, 2020 AT 9:56 AM (Merged)
Tiny
RASMATAZ
  • EXPERT
Try replacing the thermostat and see what happens
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Tuesday, December 1st, 2020 AT 9:56 AM (Merged)
Tiny
SLUSHPUPPY
  • MEMBER
I have replaced the thermostate and flushed out my whole system and it worked for a couple days but now I got this problem
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
RASMATAZ
  • EXPERT
Make sure the coolant level is correct and try bleeding it could be airlock in it-if it continues have it block and pressure tested-
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
SLUSHPUPPY
  • MEMBER
Okay ill try that. And I was told it cold be the heater core and there a ***** to replace
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
RASMATAZ
  • EXPERT
How long ago did you replaced the Stat? -Could be the problem again
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
SLUSHPUPPY
  • MEMBER
About a month ago
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
PB2010
  • MEMBER
  • 1999 DODGE DAKOTA
  • V8
  • 4WD
  • AUTOMATIC
  • 101,000 MILES
My 1999 dodge dakota had a new heater core put in it and new therm but whem temp control knob is turned to heat airflow drops to almost nothing and what does come out isnt hot, I hear a door moving back and forth but wonder if there is 2 doors that the cable operates and do I have to take heater core housing out to fix.
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
KHLOW2008
  • EXPERT
Hi pb2010,

Thank you for the donation.

Seems the cable is out of adjustment. Heater core need not be removed for adjusting the cable.

Here are the procedures.

ADJUSTMENTS

TEMPERATURE CONTROL CABLE

1. Ensure temperature control cable housing and core are connected at both heater control panel and heater assembly. Ensure heater control panel is properly installed.

2. Rotate temperature control knob so that knob pointer is at 12 o'clock position. Pull temperature control knob straight out from heater control panel until perimeter of knob (not knob pointer) protrudes about.25" (6 mm) from face of heater control panel.

3. Rotate temperature control knob clockwise so that knob pointer is at one o'clock position. Push in on knob slightly and continue rotating knob to its full clockwise stop. Place knob pointer at a position about.32" (8 mm) beyond end of Red stripe. Release knob. If knob is pointing at about.32" (8 mm) beyond end of Red stripe, go to next step. If knob is not pointing at about.32" (8 mm) beyond end of Red stripe, go back to step 2 and repeat
adjustment procedure.

4. Rotate temperature control knob counterclockwise so that knob pointer is at 12 o'clock position. Push temperature control knob straight into heater control panel until perimeter of knob (not knob pointer) is flush with base of heater control panel.

5. Rotate temperature control knob to its full clockwise stop. Release knob. Knob pointer should be aimed at end of Red stripe. If knob is pointed at end of Red stripe, go to next step. If knob is not pointed at end of Red stripe, go back to step 2 and repeat adjustment procedure.

6. Rotate temperature control knob to its full counterclockwise stop. Release knob. If knob springs back, self-adjuster clip securing temperature control cable to blend-air door lever is improperly installed. See TEMPERATURE CONTROL CABLE under REMOVAL & INSTALLATION. If knob does not springs back, temperature control cable adjustment is
complete.
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
CPT_GO
  • MEMBER
  • 1999 DODGE DAKOTA
  • 6 CYL
  • 4WD
  • AUTOMATIC
I have a 1999 Dodge Dakota, V6 engine. I'm getting very little heat. Thermostate has been changed and system drained and flushed.
I'm thinking heater core needs to be flushed seperately(how is that done?) Or maybe heater control valve or control.
Please help
Glen
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
NOTE: NEVER OPEN THE RADIATOR OR REMOVE ANY COOLING SYSTEM HOSES WHEN THE ENGINE IS HOT>

Before doing anything, do this. Start the engine, let it warm up with the heater on high. Feel both heater hoses. If one is cold and one is hot, then flush the heater core by removing the two hoses and forcing water (from a hose) through the core in both directions. They do make kits for them, but usually all that is needed is water pressure in the opposite direction of normal water flow. After you finish, reconnect the supply hose to the heater core and tighten. Reattach the return but don't tighten until you start the engine and allow the coolant to flow through the hose to eliminate air from the system.

If both heater core hoses are hot, then you need to check the blend door. It determines if you get heat or AC in the vehicle. The Blend door is near the heater core. If it is stuck in the cool position, you will not get heat.

Let me know what you find.

Joe
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Tuesday, December 1st, 2020 AT 9:57 AM (Merged)
Tiny
BCQB12
  • MEMBER
  • 1998 DODGE DAKOTA
  • 6 CYL
  • 2WD
  • MANUAL
  • 165,000 MILES
I have a 98' Dodge Dakota sports V6 magnum. I live in Michigan, and it is Fricking cold! My air conditioning works awesome, super cold, but I have no heat. My blower works on all settings, low to high, and I can change vents, defrost, floor, etc. But there is never any heat blowing. Does anyone know why there is no heat?
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I need you to check two things for me. First, make sure the engine is running at a normal operating temp. Also, with the engine hot and the heater on, feel both heater core hoses. They should both be hot.

Let me know what you find.

Joe
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
BCQB12
  • MEMBER
The temp gauge reads about 200, I just had a the system flushed, and am getting minimal head. The hoses are warm, not extremely hot, the top one is hotter then the bottom. Thanks for any additional info you can give.
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Did you have the heater core flushed? It sounds like there is not enough flow through the heater core.
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
CARREPAIR99
  • MEMBER
  • 1998 DODGE DAKOTA
Heater problem
1998 Dodge Dakota 6 cyl Two Wheel Drive Automatic

why the heater won't get very warm in my truck, even I already change out the thermostat. Please help me.

Thank you.
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
CH112063
  • MEMBER
Hi do you have time to open the hood to feel around and see if there is heat getting to the interior, by checking the heater hoses? How many miles are on it, and does the gauge read hot(temp)?
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
YUP
  • MEMBER
  • 1998 DODGE DAKOTA
  • 5.9L
  • V8
  • 4WD
  • AUTOMATIC
Replaced thermostat and filled radiator. Engine barely warm and no heat
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)
Tiny
JOHNNYT73
  • EXPERT
After filling the radiator did you leave the off cap when you started it up and let it run?
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Tuesday, December 1st, 2020 AT 9:58 AM (Merged)

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