Bunn-O-Matic Coffee Brewer GRW8 - Page 6 - Answered Questions & Fixed issues

It depends on the model you have but usually as long as you had water in the tank you can use as usual. If the power was off for a long time it will take up to 20 min to heat the water back up to temperature.

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)

The heating coils may be calcified. With the machine off- pour some vinegar into the water tank. Let it sit over night. then pour clean water in and run it at least 3 times to flush out the vinegar.

You will need to replace it, parts are not made for repair except under warranty.

Ac supply may be Good but PCB may be foulty

you would have to unplug it, and then turn it upside down over a sink with the cover and coffee pot removed. be careful, the water in the reservoir is quite hot and ready to brew.

you could remove the cover and look for the connection that isn't connected properly - - be careful not to touch electrical connections/bare wires when cover is off - or take it to a technician - or contact Bunn directly for suggestions. regards,

You should be able to run a solution of vinegar and water thru the machine to clean the insides. About one half cup of white vinegar and four cups of water should do the job. After you have done this, run a couple of cycles of clean water (full pot of water) thru the unit to remove any loose residue or remaining vinegar.

hope this is of some help the thermal fuse is blowing because the unit is getting to hot you replacing the thermal fuse has not cured the problem, and it will blow again , the problem is the thermostat is set to high or is faulty / allowing the unit to go over temperature hence the thermal fuse blowing its the control stat that you should be looking at. good luck

You will need to replace the coffee maker.

Defective temperature sensor is my guess, try running white vinegar through it a few times, the sensor may have hard water deposits on it which can alter the readings.

Check the home panel circuit breaker first. Then plug the brewer in to another outlet. If that doesn't work, there is a chance that the switch is bad. Happens too often on Bunnomatics.

I made a video for the Bunnomatic pour over brewers commonly found in homes. I hope this is yours

sounds like hard water problem try vinegar or a friendly CLR product calcium lime rust

Yes, use white vinegar. ...

Most likely there is electricity short fall somewhere, check socket, if not then open machine and check if all cables are in place. Check for current. If that doesn't do then it must be electronics.

They stick after a while, with dried coffee, all I can suggest is to soak part in Very hot water for a while to see if it loosens up.

Yes. It's a tank gasket that can be purchased from www.bunn.com. You'll have to remove the trough above the tank, wires, fuse, temperature probe, water inlet, hot water output tube, and 8 nuts to get to it.

Depending on model there is a switch for the elements on the back on machine that has to be in on position.

There is a shear plate which connects motor to shaft.