Temperature on highest hot blows cool air

Hi,

If you aren't getting heat in the vehicle, it can only be a few things. There could be an airlock in the heater core, the blend air door may not be working, or it's low on coolant.

Start by looking through this link:

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

If that doesn't help, do the following:

1) Start the engine and turn the heater on high. Allow the engine to reach operating temperature.

2) When it reaches temperature, feel both heater core hoses under the hood where they attach to the heater core at the firewall. (see pic 1 for example)

3) Check if the hoses are both hot.

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If one is hot and the other isn't suspect a plugged heater core or an air blockage.

If both are hot, then we know hot coolant is flowing through the heater core. Thus, the heat is in the vehicle but not being distributed. That leads me to the blend air door.

On this vehicle, the blend air door is actuated by a cable. You will need to locate the cable behind the controller and follow it. Check to make sure it is not broken or out of adjustment. I have seen the cable come off the mount near the blend door and when you adjust the door, the cable moves and not the door.

I attached a pic below (Pic 2) showing the cable I'm referring to. For some reason, the manual doesn't provide the other end of the cable. That is why I recommend tracing that cable.

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Let me know if this helps or if you have other questions.

Take care,
Joe

Okay. Are you able to disconnect the cable and manually move it by hand to see if you then get heat?

Let me know.

Joe

Hi,

Nothing in my manuals show a heater control valve, which sounds like what you are referring to. Can you take a pic and upload it for me to see it? However, if you see something that is plugged, that is certainly a problem.

Also, which fan was replaced?

Let me know.
Joe