New chicks should be kept at a temp of 35°C (95°F) (32°C is equivalent to 89.6°F and that is where you would want to be at week two). Each week you lower the temperature 5°F until you get to room temp.
So, if I did my match properly, you should start out at 35°C and in one week lower it to 32°C, then one week later lower it to 29, then 26°C, then 23°C, then 21°C. At that point, your chicks should not need any additional heat source unless you are putting them into a very cold space or if you are putting them outdoors and it is particularly cold, you would want to supplement their heat.
You might be able to supplement your heat pad heat source with a regular light bulb placed above that area of the brooder. Be sure not to overdue the heat as you can easily cook the chicks
Watch them carefully and see if they huddle up on the pad or are on the outskirts of it or are on the other side of the brooder all together. Their behavior will tell you allot! It will tell you if it is too hot or too cool for them. For instance, if they are not all piled up on top of each other and look comfortable and not peeping loudly or panting, then you should have the temp near something they are comfortable with. If they are in a pile on top of each other, them temp is too cool...(this can also cause smothering).
Be sure to put a thermometer in with them where you can read the temp where they are, just be sure that they can't get at it if it is the glass type. You can get the plastic round disk type at most pet stores where they sell reptiles.
I hope this helps and good luck with your new hatches