High frequency stays on

[Lhadsorb]

miller syncrowave 250 and I turn it on and the high-frequency stays on even if I put it on start or continuous if I put it on the center (panel) which is scratch start it turns off this is without the footpedal or remote control hooked up any help would be appreciated I am stumped

[cruizer]

well its either the panel switch (unlikely) or a stuck relay in behind the right front, lower panel. whack em with the blund end of a screw driver.