[DHunter]

Originally no heat, so I replaced the dryer element. During this procedure, I noticed the 240 plug would spark. It was not fitting tightly and when checking the voltage at dryer it was 120. (note both plug and receptical are new). Reinserted and got 240 and heat.

Now the timer does not move, also no heat.
I plan on checking the thermal fuse, voltage...what else ?

Also can the plug be "hard wire" as maybe vibration causes the connectors to become loose, thus allowing only 120 volt.

[Gene]

Hard wire is not a good idea because it's unsafe and it's illegal in most states.

I would call a certified electrician to make the plug/outlet connection reliable and check the circuit breakers. I believe it should be done first prior to the dryer troubleshooting.

What is the complete model number of the dryer?

Gene.

[DHunter]

I just jiggled the plug and now have 240 v at dryer. Clothes are drying fine now.
I wonder about the hard wire, as my electric stove could be either hard wired or plug in.

[Gene]

...I just jiggled the plug and now have 240 v at dryer...

Such poor connection can cause the plug and/or outlet to overheat and catch on fire.

Regarding hard wire you have to check with the installation instructions.

Gene.