I disconnected the wires from the thermister and turned the machine on and received an error code on my "brain board" .... (p.s. never buy a machine with a dang microprosessor board....next time its regular old turn the dial for me... and heck...I build electronics for a living...lol )

soooo I did something else tonight... I brought a thermal-couple home from work. Watched the temperature inside the dryer cycle from 118 F to 155 F and back again... then thought I would get brave and bypassed the thermostat that is on the heater coil housing and watched the temperature go up and up and up.... all the way to 180 F before I chickened out and shut it off... I thought the thermostat in the exhaust would of shut it off eventually. Its an L150 so I assume that the exhaust temperature never reached 150 f or it would of but 180 degrees inside the dryer scared me off. Anyone know what your dryer temp inside should be at?

I gave up.... pulled it outside and set it on fire.....

just kiddin...but I sure feel like that. The service place also said vent which is clean...keeps on cycling on the high limit stat.... I give.

Since you know the house vent and cover outside are clean, pay more attention to the dryer. Make sure that the blower is not stripped, make sure there is no build up inside the blower housing. Make sure the lint screen is not clogged. (it can look clear, but run water through it to make sure.) If all that looks good, then the "circuit board" may be the problem.

through the entire posts of checking this and that I did not see the easist thing. DISCONNECT the dryer from the vent and mesure the temp of the airflow on the high setting you should get 150 degrees.If you do dry a load without the vent hooked up does it dry normal? If so the vent is pluged. If you dont get 150 deg then its a thermostat prob.Another question how wet are the cloths going in maybe you have a washer spin prob.