I read most of the comments and decided to take a look at our WRS 342 FIAM C2. The dealer repair shop has left us waiting for weeks. Finally they called and said the wrong part came in. I took down the unit at the top of the main chamber like people said on the web. It was very stiff. Jiggling the plugs seemed to fix it but when I snapped the unit back the flashing started again. After a couple of times, I examined the position of the 4 rather large and stiff wires feeding into the plugs and thought that maybe those wired mechanically tilt the plugs when they are stuffed back in. Next time, I was very careful to be sure they were lined up to miss other parts in the compartment before snapping back This has worked so far. Other comments: No corrosion visible. The lights were fine when I let the unit dangle. Incidentally, the wires came in through a hole with insulation wool behind it so I suspect some cold air seeps out continually. Bad.