It is a 14 year old Whirlpool commercial coin operated electric dryer (CE2950XY) for an apartment complex. Replacing it is not an option because it is $1300-1600 for a new one. If you press the start cycle button after putting in the correct value, it would run for a while (like 15 mins) and stop. Then you can press the start again and it would run for a while. After couple cycles of restarting, you need to wait for a while before you can restart it. The motor is new (burnt), had replaced the fuse a few years ago, but currently suspecting the timer ($94), push button assembly ($116), door switch ($20), thermostats ($14 and $18), belt (low cost), and the ring bearing ($26) of the tumbler. I am a bit concern about the timer and push button assembly's cost, and think I would replace everything else I mentioned up there. Any recommendation on what else to look for and how to inspect?