my dryer will not turn on even though the power supply is working good
I think you may have a typo with your model number, cannot find RED440VQ1. The following is for RED4400VQ1.
Here are your parts
Replacement parts for WHIRLPOOL RED4400VQ1 29" ELECTRIC DRYER | AppliancePartsPros.com
See the attachment for the wiring diagram.
How do you know the power is OK?
The timer and heater on this unit run off of the 240 but \the motor requires 120 volts (Neutral to L1)
A common fault is a blown thermal fuse (Item 7 in Section 3)
If it is blown be sure to check/clean your vent system as it is the most common cause of it going.
Next would be the push-to-start switch and the door switch.
EED4300.pdf (548.9 KB)