Do you have repeat calls on a Schindler 330? If so look at resistor R176 (lower left) on the board. This has to be a board problem that they know about. Have replaced at least 6 of them. Customers tell us that they will never put another Schindler elevator in again. They feel ripped off and Adams engineers won't acknowledge the problem. R176 will burn up in 1-2 yrs. and you will get continuous door faults. Touch the burnt resistor with an ink pen and it will fall off the board. Low bidder doesn't always mean quality!!