Hello. New here all help would be greatly appreciated!

last year I changed my blender actuator passenger side. Coolant level is good.

I only get luke warm air on passenger side vents now. Hot on driver side.

Edit: The heater element ís cold, what can be the causes?

any idea what could cause this?

 

I know nothing about the heating system
But, have heard that the blend door actuator can also control the coolant flow??
Who changed the actuator?

 

Sometimes an actuator has to be cycled to place it in the proper position before installation.

 

Hi, is your car Diesel? I believe that only diesels have an electric preheater alongside the heater core. I have seen that my preheater only works when the heated-seat switch is activated. I discovered this while trying to find a solution to why I was only getting heat on one side, even though the actuator and blend door appeared to be working fine (I removed the preheater and could see blend door working full travel). I have consulted my local Hyundai dealer but they don't know what the problem is. have you found a solution?