My heater is not working why?

Make sure that you bled the system. Based on your discription, it sounds like you have an air block. With the engine cold, loosten the return heater core hose and start the engine. If there is air in the system, it should push out and coolant through.

Lots of things can cause that. First get the vehicle warm and then feel the heater core hoses directly at the fire wall post back what you find:

is one hot and one warm?
One hot and one cold?
Both hot?
Neither hot?

First, believe it or not, you need to have the computer scanned to identify why the HVAC lights are flashing. The smoke you mentioned can be a couple things. If it had a sweet smell, it may have been coolant from a leaking heater core. If it had an electrical smell, it could be wiring, the blower motor, blower motor resister, and the list goes on. As far as the other items, what you described sounds like a problem with a ground. Check for bad grounds under the dash as well as under the hood (body grounds).

Is it your anti-freeze that's leaking? Try to make sure there is fluid in the radiator after its cold, only. Its coolant circulates inside your interior and this is probably the reason for no heat, this is bad so try to have it checked for where its leaking, ok? Let me know if you find it or need advice, ok?

Good evening,

There are separate actuators for each side. I attached a picture and the procedure for you to view.

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

Roy

The air conditioning system can be equipped with either a standard, single blend-air door actuator, or it can be equipped with dual actuators. The dual system has separate blend-air controls. This allows for separate control of the driver's side air, and the passenger side air.

1. Remove the lower left side steering column cover.

ABS Control Module
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2. Remove ABS control module.
3. Remove blend-air actuator connector.

Blend-Air Actuator
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4. Remove blend-air actuator.

INSTALLATION
1. For installation, reverse the above procedures.
2. Perform the HVAC Control Calibration Diagnostic and Cool-down test. Repeating the test is necessary to clear the fault codes.

Start by checking the thermostat, heater control valve, heater core and air blend door-

Hi:
Is the engine overheating?

Joe

Hi:
If it's not overheating, the pump should be fine. You may need a new belt or one is loose. As far as the heater, it the t-stat is new and the controls are working, I think I would start with flushing the heater core. It may be plugged. Are both heater core hoses getting hot when the heater is on? If only one is hot, coolant isn't circulating.

Let me know if this helps.

Joe