You definitely have to have an open mind these days if you want to get something fixed in a short amount of time for a reasonable cost.
I couldn't find the db electrical motor "lai00015". Please post the Amazon link to the motor you purchased. And post the model number of your HWH system.
Also, Stuarts Service in Elkhart 800 826-6267 has been a very good source for help and quick turn-around on orders. They know everything about HWH systems, stock and sell all parts at very reasonable prices.