My heater is not working why?

Hello,

Are you loosing any coolant or is your floorboard wet? If so this could be a problem with your heater core. Regardless I am giving you a few links to go through. The first link will help you pinpoint what the problem with your heater is, and the other two are possible fixes, depending on what you find. Let us know what you find out.

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

Thanks,
Alex
2CarPros

Good morning,

Make sure the coolant level is correct.

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

Does the temperature gauge read normal?

When you command heat and cold, can you hear the blend door inside the dash move back and forth? Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car.

https://www.2carpros.com/articles/replace-blend-door-motor

Check the hoses under the hood to the heater core and make sure they are hot. You may have a clogged heater core. Check out the diagrams (Below). Let us know what happens and please upload pictures or videos of the problem.

Hi and thanks for using 2CarPros.

This can be caused by a few things. Things such as low coolant, a plugged heater core, a bad blend air door actuator can all lead to no heat. First, take a look through this link:

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

Here is what I need you to do. First, confirm the engine coolant is full and clean. If it is, start the engine, turn the heater on high, and allow the engine to warm up to operating literature. Once it reaches operating temp, turn the engine off, open the hood, and feel both the supply and return lines going to the heater core. The hoses are approximately an inch in diameter and will run from the engine to the firewall. If you take a look through this link, you will see what the hoses look like and approximately where they will attach at the firewall.

https://www.2carpros.com/articles/replace-heater-hoses

If one hose is hot and the other isn't, the heater core needs either flushed or replaced. In this case, allow the engine to cool off. Remove the hoses at the firewall and try to flush water through the heater core using a garden hose. Do it in both directions.

If you can't get water to flow through, it needs replaced.

If the aforementioned test doesn't show a plugged core, see the last set of directions related to a blend air door.

Here is a link that shows in general how one is replaced:

https://www.2carpros.com/articles/replace-heater-core

Here are the directions specific to your vehicle. The attached pictures correlate with these directions.

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HEATER CORE

Picture 1

Removal and Installation

NOTE:
- If a heater core leak is suspected, the heater core must be leak tested before it is removed from the vehicle. See: Heating and Air Conditioning > Component Tests and General Diagnostics
- It is not necessary to install new heater core inlet and outlet tubes when installing a new heater core unless there is evidence of damage to the heater core tubes. The new O-ring seals supplied with the heater core service kit must be installed any time the heater core tubes are detached from the heater core.
1. Drain the engine coolant. See: Cooling System > Service and Repair
2. Remove the 3 glove compartment screws and the glove compartment.
- To install, tighten to 10 Nm (89 lb-in).
3. Using a suitable utility knife, carefully cut the heater core tube cover along the rib as shown.

Picture 2

4. Detach the climate control wire harness connector from the heater core tube cover.
5. Remove the 2 heater core tube cover screws.
6. Remove the cut portion of the heater core tube cover.

7. NOTE: Before disconnecting the heater core tube connections, position a suitable drain pan to catch any residual coolant that may drain from the heater core or heater core tubes when disconnected.

Remove the 2 heater core tube connection clips and disconnect the 2 heater core tubes from the heater core.
- Discard the O-ring seals.
8. Detach and remove the heater core access door.

9. NOTE: The heater core must be carefully manipulated to clear the blower motor housing while being removed.

Remove the heater core.

10. NOTE: Be sure that the new O-rings are installed, and the heater core tubes are fully seated into the heater core before installing the heater core tube connection clips.

To install, reverse the removal procedure.
- Install new O-ring seals.
- Apply a suitable black duct-type tape over the cut in the heater core tube cover.
11. Fill the engine coolant level. See: Cooling System > Service and Repair

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If both heater core hoses are hot in the aforementioned directions, the last thing is the blend air door. This door determines if heat or AC enters the vehicle and is also located under the dash.

Here is a link that shows in general how one is replaced.

https://www.2carpros.com/articles/replace-blend-door-motor

Here are the directions specific to your vehicle. The remaining pictures correlate with these directions.
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TEMPERATURE BLEND DOOR ACTUATOR

See picture 3

Removal and Installation

NOTE: The temperature blend door actuator can be accessed from below the instrument panel to the right of the accelerator pedal.

1. Disconnect the temperature blend door actuator electrical connector.
2. Remove the 2 temperature blend door actuator screws.
3. Remove the temperature blend door actuator.
4. To install, reverse the removal procedure.

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

Take care,
Joe

Be very careful with that cardboard trick. You can toast your engine real easily. It only takes one severe overheat to do that.

For your overheating problem I would first try a 195 degree thermostat and make sure you get all the air pockets out of the system. We use a vacuum fill tool to accomplish that.

You are on the money with the thermostat it sounds like it is stuck open.

Here is a guide to help you see what you are in for when changing the thermostat out:

https://www.2carpros.com/articles/replace-thermostat

Here is what it will be like for your car (below).

Do not put cardboard in front of the radiator please.

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken

Are both heater hoses hot to the touch where they go into the firewall?

Is the fan working?

How did this start?

You only answered one of three questions.

Temperature of heater hoses?
How did the overheating begin? When?

If you have a radiator hose swelling, that hose needs to be replaced. That has no bearing on the issue.

You do not have an overheating problem. It is acting exactly as it was designed to. The fact that the fan cycles on and off proves it has done its intended job. The cars are designed to run hotter at idle and slow traffic for emissions and fuel mileage reasons. Most of these cooling fans aren't programmed o come on until about 227 degrees.

You do not have anything to worry about there.

If the upper radiator hose is hot but the heater hoses are not, then your heater core is likely plugged up. I hope you have never added any sealer to the system.

If you can locate the two heater hoses that go into the cab area, feel them both after the engine is warmed up. I would like to know if they are both hot or only one. Post your findings back hear and we'll try to get you an answer.