(Last Updated On: August 28, 2021)

Generally, there are two things that can cause this problem: It is either from defective door interlock switch or interlock relay on the power circuit board.

First you should look at the door’s interlock switch which may be stuck. The contacts in the latching mechanisms can fail or become intermittent. If the switch appears to be defective then replace the switch.

If the switch appears fully functional, then the problem is probably coming from defective power control board. Most likely it is the interlock relay on the power control board. In this case, replace or try to repair the power control board.

In some rare instances, a power control board can develop a crack on the printed circuit board, which may cause similar issues such as this or running while the door is open.

In both cases, the problem should be between the door’s interlock switches or power control board.

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