Mr Fixit, this is one of the "subcompact" models that uses a 120 volt heater. Not a stack unit, but "stackable", as he said. Even on its best day it takes an hour and a half to dry a big load.
Model is actually 110.88390110
To the homeowner, all you have to do is use your voltmeter to see if there is 120 volts to the heater. It passes from the timer thru the temp switches, the motor centrifugal switch to the heater. Very well could be a timer, but let's be professional. You are aware of the tech sheet in the cabinet?
120 volt heater- (9.4-9.8 Ohms)