Here are your parts
Replacement parts for WHIRLPOOL WED6400SW1 29`` ELECTRIC DRYER | AppliancePartsPros.comSee the attachment for the tech sheet.
And here is a service manual
Whirlpool 8178584 Cabrio Dryer Service Manual - ApplianceDigest.com You will have to join the site to get the manual but it is a good site for info for the appliance DIYer.
Probably would not be a bad idea to check the power to the unit.
Try flipping the breaker off/on slowly a couple times, sometimes you can loose half the line without actually tripping the breaker.
If this does nothing, check the voltage at the plug
L1 to L2 should be 240 volts
L1 to Neutral and L2 to Neutral, both should be 120 volts.
If OK
Unplug the unit and check the wires at the terminal strip in the machine to make sure none are loose or burned out
If OK
Check the power at the terminal strip.
[COLOR="Red"]Be careful as 240 volts is lethal !!! [/COLOR]
Try running the diagnostics to see if an error comes up.
Check the heating coil.
Unplug the unit and remove both wires from the heating coil.
Then measure it with a meter, should be around 10 ohms.
Then measure from each connector to the case, both should be infinite ohms (open).
If not it could be the coil is grounded and is causing problems.
If OK
Check both thermostats with a meter, see the tech sheet.
If you do not own a meter, I would suggest you purchase a one. You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.
There is a good STICKY at the start of this forum about it's use.