I want Arduino sketch for this heater and code
Even if we have the full specifications of the heater we won't design your project and write the code for free. This forum is to help people with their projects. That means that you try to do the work and we help if you have trouble.
If you want someone to do the work for you, post in the Gigs and Collaborations section. Expect to pay.
Read the how to use this forum-please read sticky to see how to properly post code and some advice on how to ask a good question. Remove useless white space and format the code with the IDE autoformat tool (crtl-t or Tools, Auto Format) before posting code.
I am on trouble because I don't how start a code for this heater but thank you
I don't how start a code for this heater
Neither do we. We don't know enough about the heater or what you want to so with the heater to help you. We can't read your mind. You have to explain what you want to do before anyone can write any code.
Like I tried to say, we need the specs on the heater. What is the voltage of the power supplied to the heater? Is the power that you want to supply to the heater AC or DC? I assume 110V or 220V AC but I hate to rely on assumptions.
Will you want to control the temperature? You will need a temperature sensor. What is the maximum temperature that the sensor will see?