Top 20 Bunn-O-Matic Coffee Brewer GRW8 - Page 6 Questions & Answers

You should call your vendor for service on any commercial brewer. (Especially if it's on loan from them) *** the following is for information only as all repairs should be performed by a qualified tech.*** The start switch activates the timer (analog or digital) board which turns on the water feed or brew valve depending on the model. * It's not often the momentary brew switch goes bad even though it's pressed many times a day. * Check the on/off switch * Check the timer. Digital timers tend to be sensitive to electrical storms. Analog timers have a dial and are more tolerant of electrical surges. * Check the brew solenoid if stuck or not operational. * Check the water fill solenoid. Should be a definite click when activated. Water filling sound should be very clear. * No water flow then check the water supply line if it's on. * Final; this brewer needs service. High voltages present in larger brewers often with 240VAC to 440VAC. Aloha, ukboy57

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.

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

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

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.

If it's round about the size of a 50 cent piece then it unscrews counter clockwise. You can still clean it with a tooth brush of espresso brush. Wipe clean when done. Aloha, ukeboy57

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.

Good. Morning My rule of the thumb is to leave all electrical appliances plugged at all times, when I am at home, when I travel I unplug everything. The TV!, DVD, coffee machine and so on. I usually leave one radio on. So when I come back there is live in the house. this has worked well for me, all the. Est Kolbrun

Solenoid, inlet solenoid needs to be replaced.

yes,but you should get the part to fix it

Go to UTube - there are some good videos out there on how to fix this. You have to take the top off and clean the flapper.

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

First you have to make clear what is causing the leak. A gasket? A burst in a pipe? Burst in the heater? When you know what, you can see (a tech can) if it is repairable and what it will cost.

There is a shear plate which connects motor to shaft.

if the coffee is ground too fine, it'll take longer to brew through. either grind more coarse or call bunn for a flow restrictor (800) 352-BUNN (2866)

The leak is most likely between the water reservoir and the tank. Bunn uses a soft silicone seal for that connection that gets compressed over time and starts to leak water whenever you make a pot of coffee. It's planned obsolescence. Bunn won't sell you a new seal. So you have to improvise. But it's simple enough to do. Remove the top cover and the plastic water reservoir right below it. Don't tamper with the little valve that opens when you close the lid. Look for the seal. It could be stuck to the bottom of the reservoir, or sitting loosely on top of the metal tank. Make sure to preserve its top-to-bottom orientation (don't put it back in upside down). Apply a narrow bead of clear silicone into the grooved side of the seal. Press the seal gently onto the reservoir, then apply a thin layer to the smooth side. Re-install the reservoir and reassemble the unit.