No front heat

Discussion in 'Interior' started by Mazi206, Jan 25, 2018.

  1. Mazi206

    Mazi206 Full Access Member

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    I changed my thermostat recently and added some coolant to my system. However, my front heat and defrost are blowing cold air. My rear heat works perfectly fine but the front is not. I’ve noticed but inlet and outlet hose are cold connecting to the firewall. What do y’all think the problem is?
     
    Last edited: Jan 25, 2018
  2. Doubeleive

    Doubeleive Elite Member Supporting Member

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    the problem is you can no longer feel heat with your hands, it would be impossible to have cold heater hose's and have heat at the same time, the heater hose's that go into the firewall also t-off to the rear. you most likely have a bad blend door actuator or 2 bad blend door actuators or broken blend door(s)
     
  3. Galante

    Galante Elite Member Supporting Member

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    3 things-
    1st as doube said, actuator (s)
    2nd not enough coolant
    3rd flush heater core... been seeing thus alot lately.
     
  4. David Smith

    David Smith Full Access Member

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    I had a similar issue. It was my heater core. I just flushed it both ways a few times and now I have heat again. My hoses were not cold. I would try and take 10 mins to flush the heater core. To me, it is probably the quickest and easiest thing to try.
     
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  5. Mazi206

    Mazi206 Full Access Member

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    Thanks for the feedback guys!
     
  6. Musicars

    Musicars Member

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    I have been fighting with similar issues. I have drained coolant a couple of times in the last couple months while replacing the waterpump, radiator, and flushing the reservoir. Each time it took about 4 days to get the front heat back. I added coolant a little each day until the reservoir stayed full. My assumption was air remained trapped. Could be from crud in core, probably will never know for sure, but at least the heat is back. I also tried overfilling a bit thinking that would save time. Big mistake as it just caused coolant to puke out the overfill tube. Only slow and steady worked for me.
     
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  7. Mazi206

    Mazi206 Full Access Member

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    I’ve also notice it won’t let me change to the other air type. It lights up 4 times and just doesn’t switch. Does this mean it’s the blend door?
    B38F724A-8978-42CE-BF27-5C36EC541443.jpeg
     
  8. Galante

    Galante Elite Member Supporting Member

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    Thats recirculated air, sometines it has to be on an a/c function, cooler temp for that to work, try swapping temp first then air direction and see whats up
     
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  9. Mazi206

    Mazi206 Full Access Member

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    Update: I changed my blend door actuator however there is still no heat. Should I flush it now?
     
  10. sumo

    sumo dn ʇǝƃ ʇuɐɔ & llǝɟ ı

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    Did you turn the knob and verify that the blend door is actually moving? You could also have a stuck heater valve or broken cable. You can check that by manually moving the valve and see if you get heat. Last thing I would check is often with vehicles with rear heating, air can get trapped in the system. You can try bleeding by removing the cap, jack up the front and let it run. Raising the front up will help the trapped air work it’s way out to the top
     
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