Why is my dryer tumbling but not heating?
A blown fuse or tripped circuit breaker can cause the dryer to tumble but not heat. Check the house fuse/circuit breaker box and replace the fuse or reset the breaker. If you have a gas dryer, also make sure the gas shutoff at the dryer and the main shutoff are fully open. (Page 12)
From the official Whirlpool Lint Front Load Dryer manual, page 12
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