20 Most Recent Bunn Automatic Coffee Brewer CWTF15 1 - Page 3 Questions & Answers

This sounds like the light flickering rather than a faulty connection. You can check for a bad connection by tuning a nearby radio receiver to no station in the AM band. If there is a bad connection causing this you'll hear the sparking (in time with the flickering) on the radio. Flickering is a common effect seen with neon indicator lights when they age and does not affect the switch function at all, so can be safely ignored.

The water inlet valve may be stuck open from mineral deposits. You can get rebuild kits for the older ones or just replace the valve?

Rear wall may have a crack in it? Examine it closely.

If all passages are not plugged up it should flow through with or without heat in the tank.

Ignition lock

It could be so much lime build up that the water going in is too much for the water to come out so it will leak out the top from the thermostat hole plug and or the water pan is flowing over the top cus no place else to go?

Underneath the warming plate is a element assembly that will have 1 or 2 thermal fuses and a temp sensor. If any of these have faulted that condition will arise. I suspect that the temperature sensor is 'sticking' in the open position. If you remove the bottom cover (while unplugged of course) and lightly tap the sensor with your screwdriver it may remedy the issue for awhile but the initial cause of the problem will still exist. If the brewer is worth it you can replace the sensor otherwise it may just be cheaper to recycle it.

A model number would be nice but since all (drip) coffee makers are generally the same in principle I'd wager it's your temperature sensor (underneath the heating plate) or when you plugged it in voltage escaped through the switch causing the unit to be 'on'. Think of a coffee maker like the first 1/2 of a steam engine. Water from the reservoir gets converted into steam by a burner (also warms the heating plate for the carafe) and instead of the steam driving components it gets condensed above the coffee grounds. Without that temperature sensor the burner would be going 'full blast' all the time and burn your coffee which is why a broken sensor will cause a 'no heat at all' issue while a failing one can give false signals to the control board. I hope this narrows down your issue and good luck!

Clean a Bunn coffee maker once every three months if you have hard water. ... Unplug the Bunn coffee maker from its power source. Verify the brew funnel is in place in the machine, and set the decanter in the unit as if you were going to make coffee. Add 1 quart of white distilled vinegar to the top of the brewer.

I used silicone to make my own gasket, worked perfect

This could be an issue with the wiring of the fill and brew valves or it could be an issue with the control board. When you draw water off, the machine should replace the same volume of water by opening the fill valve. If the brew valve is opening at the same time, tgen there is an issue. I recommend placing a service call.

CHECK THE PRESSURE IN THE PRESS GAUGE IF THE PRESS IS 2 BAR SO IT MEANS THE HEATING ELEMENT IS WORKING AND AND THE PROBLEM IN STRAINER MAY BE NEED TO CLEAN

Might as well replace it, they don't really repair these.