heater controls do not work .heater at full blast all the times

Welcome. A mod can move your post to the Fabia Mk2 section and maybe help there. & there are similar posts you might get with a search.

What is your car, petrol or diesel. Is it new to you,

or just this issue new?

Edited 28 November, 202528 Nov by Evolution13

diesel.new here so how do i move my question.i have no idea

It is moved.

May need the heater flaps adjusted/calibrated. On my octavia its as follows

Turn on the ignition, press and hold both the AC and Front Vent buttons (third ion from left?) until both lights start to flash then you'll hear the flaps calibrating and the lights will stop flashing after 10-20 seconds.

Mine has climatronic control

Alasdair

thanks but different on a Fabia