Bunn NHB Coffee Maker "wont full pot" Questions

wont brew a full pot when i turn the coffee on it will grind the coffee but then will only brew 1 to 4 cups at a time im not quite sure what to do about this please help I had the exact same problem ...

...wont breww full pot, some coffee makers have a adjust switch but cant find that adjustment on this one please help with this problem The machine will allow you to brew from 4-10 cups. It works on a ...

...wont stop spitting and hissing even when not in use I've had this machine for 5/6 years now and never had any problems with it before. At the moment I'm unable to use the machine at all and I'm at a ...