Heater is blowing cold air?

Take it back and have them bleed the system of air pockets. Also, make sure the coolant level is full. This guide can help us.

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

Please run down this guide and report back.

My information shows a 195 degree thermostat. So on a fully warmed up engine, the temp would be over 200 degrees F. Are the heater hoses hot? You may need to flush heater core and or check coolant flow through heater core. With a belt driven water pump, the pump speeds up with the rpm's. So the water pump could be an issue? Belt issue? Idle rpm issue? At the moment my thought is to check coolant flow through heater at idle.

Double check the coolant level. The heater is the first item that stops working properly if the level gets low. Because of it is design the 3.7 can get a large air bubble
in the system that causes this exact symptom, but the bottle will appear fine. The bubble gets trapped in the heater core and you get a trickle of coolant once the pump starts running hard.

To purge the air can be a bear as you need to start with an empty cooling system, park on lever ground and remove the bleeder plug on the upper radiator hose outlet.
Wrap an old towel around the area so the coolant does not get on the belt.
Now add coolant slowly until it starts coming out the bleeder.

In theory you removed all the air.
In reality you probably didn't because Jeep put the thermostat at the bottom of the engine, if it was ever replaced and the new one does not have a bleed valve on it (small hole with a pin in it) to let the air on the back side get out you still have a bubble.

The best solution on these is to use a vacuum cooling system filler. It creates a vacuum in the engine, then you use that to draw in the coolant. You can sometimes rent/borrow them from a parts store.

Hello,

It sounds like the coolant level is low or the heater core has blockage internally. Here is a video and a guide to help you run some simple checks to fix the problem.

https://youtu.be/GSE9skKnOgY

and

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

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

Cheers, Ken

Hello,

This could be a problem with your blend door actuator. I have included a link down below that is a troubleshooting guide to go through your heater and help you isolate the problem.

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

If it is the blend door actuator that is the problem, then here is a link on how to fix it:

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

If it is not the problem, get back in touch with us, and let us know what you found out. We will more than happy to assist you from there.

Thanks,
Alex
2CarPros

The actuator motor may be driving, but the blend door may be stuck closed. You need to make sure that the driver is actually moving the door first.

Hello,

You can remove the actuator and move the pivot by hand while the system is on to see if there is any change.

Here is a guide that will give you an idea of what you are in for when doing the repair.

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

Here is what it will be like on your car (below) I have included all of the blend doors in the system but the one you want is the first one which is the temperature blend door.

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

It could be a vacuum line going to the blend door actuator or one of the electric actuators is out.

Here is a guide that will give you an idea of what you are in for when changing the actuator.

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

Check out the diagrams (Below)

Please let us know what happens.

Cheers

No problem please let me know what happens.

Are you referring to the temperature of the air or the force of the air flow?