Tricity Bendix tcr2 tumble dryer not heating?

The drier is no longer heating up. I took panel off the back, and then inserted a needle and heard a click. I put it all back together and plugged it in and it worked fine for approx 5 to 10 minutes, then went back to cold. Went through the process again, worked on hot for another few minutes and then went cold again. Can I buy that Thermostat / heating element and fit it myself. The machine is 4 years old. Joe