There are two heaters in a VRP unit (Pour over style) The brewer has a tank that your last office person poured in a full pot of water. The main heater senses the colder water and begins to reheat the water to near boiling. The new water pushes out the same amount of water into the brewing basket (funnel with coffee). Once the new water has come up to temperature then the main heater turns off. There is a warming blanket around the inside tank. This keeps the water hot and ready to brew. It uses less power than the main heater. If this blanket fails then the water will cool down to a point where the main heater heats everything back up. You may not notice this as the only indication is luke warm coffee on a freshly made pot or a 'boiling' noise every 15 - 25 mins. This VRP probably needs servicing (check Thermal blanket and Thermal fuse)
SOURCE: WASHER
sounds like a belt problem. if you're not smelling burning rubber (belt) either the belt has come loose or broke
SOURCE: bunn coffee maker makes a noise empty just like it does after the
Hello. What your hearing is the water being heated in the tank, these machines hold a couple pots of water at brewing temp all the time, unless you unplug it from the wall, or turn off the heater switch if you have one. So, as the day goes on, it will intermittently have to heat the water in order to keep it at the proper temp. I would not worry about it too much, unless water is spitting out when it does this.
Hope that helped, and thank you.
SOURCE: The Bunn CW Series overflows the pot. How canwe
Open the front panel, there is a set of instructions on it, you will have to make sure the board is set to program and not lock, before you adjust.
SOURCE: Getting to hot
The thermostat or tank heater is not working properly. Please get the model and date code located on the bottom of the machine and contact customer service. If your machine is 3 years old or less, it will be replaced free of charge. If you machine is over 3 years old, it will be replaced at a reduced price.
SOURCE: BUNN VPR COFFEE MAKER MAKES
Couldn't find a lot about this problem, but one site mentioned making sure the unit is always filled with water, and not to fill only partially. It also said the unit makes a tiny gurgling noise when it's brewing.
The following Bunn support page mentions that it might be time for deliming in the case of loud rumbling noises. Here's the site:
http://bunn.com/retail/service/troubleshooting.html
Sounds like what may be going on with your unit.
Good luck, and hope this helps.
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