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2007 Tundra, Heater not blowing any hot air?

Discussion in '2nd Gen Tundras (2007-2013)' started by andycapp73, Oct 7, 2021.

  1. Oct 7, 2021 at 8:19 AM
    #1
    andycapp73

    andycapp73 [OP] New Member

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    andy
    Vehicle:
    2007 tundra
    How difficult is it to replace the heater core?
     
  2. Oct 7, 2021 at 9:07 AM
    #2
    CTundraForMe

    CTundraForMe New Member

    Joined:
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    Vehicle:
    2015 TRD Pro Black
    Wrangler Kevlar LT R18
    I had a similar issue with a Sienna. Turned out the coolant was very low (dealer error). Once I put about 1/2 gallon of coolant in to top it up, the heat came back.
     
  3. Oct 7, 2021 at 9:52 AM
    #3
    audiowize

    audiowize New Member

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    Definitely diagnose the problem before you dig out the heater core.
     
  4. Oct 7, 2021 at 10:36 AM
    #4
    NueveTundra

    NueveTundra Internet Certified Forum Mechanic

    Joined:
    May 24, 2020
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    Planet Earth
    Vehicle:
    07, Black Tundra SR5 CrewMax
    Exterior: Toytec ultimate 3" lift level , GoodYear helper air bags , DayStar air bag cradles, AcanII smoked headlights, AcanII smoke Tail lights (2.5 gen style), DV8 front winch bumper , Badlands 12k winch , White AUTMATCH Shackles 3/4" D Ring Shackle, White AutoBots winch hook, Trail Ridge mirrors , 20x9 Creeps rims , 33x12.50r20 RoadOnes , Black Hart cross drilled n slotted rotors , Rigid flood flush mounts rear bumper , WeatherTec rain guards , OEM black side badges , Rigid Amber Radiance Pods. Energy Suspension Red Rack and Pinion Bushings, EAG front mesh Grille, RCI HighLift bed mounts. Rough Country DS2 Steps, A.R.E OverLand Canopy with Ascend basket, Stickers: ToyTec lifts windshield banner, Red Strange Music window sticker(back cab), White Strange Music sticker(back canopy), White Rigid sticker x2 (canopy sides), white Official BigFoot Research Team (Back Canopy) Interior: Alpine double din touch iLX-650 , JL C5-653's (front) JL C1-650x (rear) , JL JX400 4 channel amp , JL JX500 mono amp , 2 JL 12" subs , WeatherTec floor mats, Kenwood F/R Dash Cams, Under the Hood: Koyo all aluminum radiator, Mishimoto red silicon hoses , XS Power 3000 amp battery , LAlectric 300 amp Alternator , K&N replacement filter. Online LED store accessories Fuse/relay box. unknown Cat-Back exhaust.
    Doing any heater core is a pain in A. But questions first

    1.) is there coolant on the passenger floor board?
    2.) is the coolant topped off in the reservoir
    3.) does the vehicle run hotter than normal
    4.) is the coolant circulating in the system
    5.) when the heater is turned do the fans blows?
    6.) does the heater control switch have the correct ohms when turning it
    7.) when the heater is turned on does the coolant valve open to circulate
     

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