My dryer quit heating, checked the breaker - that is fine. Want to replace heater element but unable to remove old one after removing screws. Is there a trick to remove old element? Your help would be appreciated.

Did you remove the screw on the side.

See Page 4-10 in the below, different unit but I beleive the heaters are the same
https://secured.whirlpoo...64beaa/$FILE/Duetdry.pdf

Measure them with a meter.
The heating element should be around 10 ohms
Both the hi-limit and cut-off should be 0 ohms

Note it the thermal cut-off is blown you have to find the cause of it blowing.

Unplug the unit and both wires to the heating coil.
Check it with a meter, should be around 10 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open). If not the coil may have sagged or broken and is touching the case. This can cause it to run on high and the thermostats cannot regulate it.

If the heater is OK then I would also replace the hi-limit thermostat as this should have regulated the temperature so that the fuse did not blow.

You still have to find the cause.
It could be:
A dirty/loose blower wheel
A dirty vent system or it's outside louvers are not opening.
A bad cycling (control) thermostat. Note this is a 4 connector thermostat.
One set is the contacts. The other set is the internal heater, should be around 25,000 ohms. This is used to give you different heat settings.

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.