No heat

Ensure the coolant level is correct. If the hoses in and out of heater core are hot, check the air/mix. It could be stuck or the actuator is not moving between heat and A/C.

When you move the heat control lever from full cold to full heat, do you hear a door slam noise?

Recheck the installation of the temperature valve door. The cable seems to be out of adjustment resulting in the door not closing fully.

ADJUSTMENTS

TEMPERATURE CONTROL CABLE

1. Temperature control cable has a self-adjusting clip located on A/C-heater module end. To adjust cable, quickly turn temperature control knob back and forth from full cool to full warm position. If clip requires adjustment, added effort will be necessary to move temperature control knob through final part of travel.

2. When adjustment is complete, temperature valve will be heard hitting stops at both extremes of travel. If valve is not heard hitting stops, remove cable end eyelet from actuator and turn eyelet until threads on cable end are flush with inner end of eyelet housing.

Here is the location of the temperature actuator I would double check that first.

Check out the diagrams (Below)

Please let us know what you find.

Cheers

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With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. If they are..........

Here is a guide that can help

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

The temperature is controlled by the use of an air mix door that is operated by an electric motor/actuator. This door can be jammed or the actuator can be inoperative or have stripped plastic gears internally.

Low on coolant? Do th eheater hoses get hot when engine warms up? If all good then sounds like a blend door problem under the dash

With the engine warmed up and running and the heater turned on, are the heater hoses hot?