We have a Bunn Coffee Maker CW Series. There was no grounds funnel or manual by the time we moved here. The boss's husband had used it for meetings. We ordered a new grounds funnel and I thought I knew how to use it but I can't make it work. I plugged it in and turned the switch on the back to on then added water and hoped to run some water through just to make sure it was clean inside but no water comes out. I need some assistance.