1979 Otis elevator for a 4 story building. Holds 6-8 people. I'm the building manager, and our elevator will work fine all day, but the next morning is the doors won't open until we turn the power off and then back on.

I've had union elevator repair out 6 times, they've checked everything, cleaned every nook and cranny, and have run up over $6K in charges and it still isn't working when we arrive in the mornings. They are suggesting a $20K computer upgrade kit. I feel like we're being taken to the cleaners, this elevator worked fine for the 6 years I've been here, until we switched to this new company (the old company was bought out and went up 50% on maintenance) It stopped working conveniently after they provided their first maintenance on it.

Obviously I need a 2nd set of eyes on it, I'm just wondering if this problem rings a bell to anyone.