Well I am no longer stumped, it was a bad cold control. The part that I received was the wrong part in the wrong box. My parts place made it good and the customer is happy, but it cost me.
A valuable lesson learned: when shopping online and the catalog shows more than one part for the same application and there is no way to confirm the proper part my serial number, Talk to a real person.
Sometimes that doesn't work. Had a customer with a Maytag stacked laundry center (front load washer) with a hollowing bearing, told them it was not a replaceable bearing, the whole outer tub had to be replaced. she didn't believe me and called the people in the blue vans, they told her it was and gave her a part number. She called me and asked if I would install it, I said I would (I just had to know), all the part manuals I found showed no bearing for that model. Anyway she ordered the part by number given to her, cost $70 shipping, turned out to be an idler pulley for the dryer. Wonder what she ever did with the washer?
I would share the Model # but I tossed it.