Run the dryer with the vent removed and no load inside non the Timed Dry cycle. Look for 145-155 degrees coming from the back of the exhaust port. Anything more indicats a stuck operating thermo (bias thermostat)
Your model comes back to a White- Westinghouse dryer, not Whirlpool. It is made by Frigidaire and your model is not compatible with any known models, so recheck it if you want specific help with this product, thanks.
Are you in Canada?