Heating up then shutting off so no steam

I'm on my second steam unit, they are rarely used, again I go to use it and it heats up but shuts off before she boils so no steam! Can I take out the thermostat? Is there a way to reset the start?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0