Absolutely you can repair your Nuheat floor heating mat.
Installing Nuheat is easy. The electric floor heat mats are ready fit right out of the box and are installed on top of the subfloor right under the flooring. Whether a standard size (square or rectangular shaped) or custom-made to fit your room (with angles and curves), Nuheat's electric floor heat mats are ready for any project, whether it's a new tile floor in the bathroom and kitchen or a laminate wood floor in the family room, you do not need to string out, cut or splice any heating wires to do the job.
Nuheat™ offers 120 standard size pre-built square & rectangular floor heating mats that are ready to fit your room and will keep almost any flooring at a warm and comfortable temperature that you set on the thermostat control. All Nuheat mats are less than 1/8” thin and are available in 120V or 240V (aka 110V or 220V), and you can install 150 square feet of 120V mats per control, or 300 square feet of 240V. Warm tiles can be yours overnight with the Nuheat under floor heating system.