Bunn CWTF 15-APS Coffee Maker - Answered Questions & Fixed issues

You should call your vendor for service. Especially if this equip is on loan from them. *** the following is for information only. All service should be done by a qualified tech.*** * CWTF have an on/off heater switch in the back of the brewer plate. Make sure this is on as it provides power to both heater and heater blanket. * There is a schematic on the back, side, or top panel. You will need a continuity meter to check the following: * There is a thermo fuse in series with the heater element. check and replace if open. * There may be a 2nd High limit fuse (disk shape) or another thermo fuse on the top of the tank. usually zip tied to the water faucet lines. check and replace if open. * There is a thermostat (adjustable) in series with the element that may be open, shorted, or out of adjustment/calibration. Replace as needed. * The element could be open or shorted to ground (ripped casing exposed electrical wires to water and grounding to tank housing). Replace element (and gaskets while your at it) * I suggest getting a repair kit with all the gaskets as they are probably burnt or cracked from age. Aloha, ukeboy57

if it's actually boiling, replace the high temp limit fuse on the top of the tank on the inside rear of the brewer. may be stuck shut. if it's just overflowing the container, recallibrate by using a 64 ounce measuring cup and the instruction on the inside of the front panel

open up the top and check the trough drain for lime. if it is obstructed, the water will overflow. use a screwdriver and poke it through the drain

thermal fuse is blown. it is located in the top, right rear of the machine in what is now browned tubing. you can either bypass the fuse with a jumper, or get a new part through bunn (800) 352-BUNN (2866)

check the heat switch in the rear. if it's on, check the thermal fuse in the top right rear of the brewer. it'll be in a now browned tubing. you can get it through bunn (800) 352-BUNN (2866)

first, delime the sprayhead and the trough drain in the top with a flathead screwdriver to ensure maximum flow. next, you'll need a measuring cup or bucket that goes up to 64 ounces. then follow the instructions on the front panel

Renew the main thermostat.

It's threaded. Simply unscrew it.

u must locate the lock bottom to open and re- programs ur temp. settings...

Yes it is possible to go the the next larger element.
Yes if the machine was plumbed there would be a difference in the way it brewed the water temp. if you look at the end hose in the pan from the solenoid, it takes a while for it to pour out 3liters.
Try using a different sprayhead(if yo;u are using a 6 hole try getting a 5 hole. That will constrain the flow of water a little more allowing the element more time the heat the water.

195*, it sounds like you have a bad thermal link or thermostat. The tank warmer blanket is all that is maintaining temp.

by 'reset' do you mean that you moved it, tilted it, shut it off and back on?

It is possible that the brew volume needs to be set, remove the front panel and you find the instructions to set the brew volume.

I would remove the front panel and check the pressure stat to make sure it is set high, turn knob all the way to the right the back it up 1/4 of a turn. It that is done and after 7 minutes water is not hotter then the problem is on the top, the hi-limit needs to be replaced.

Make sure the CPU is on the set instead of lock, then hold down the switch for about 10 seconds you should hear a click, click, click. Think of it as the water stopping and starting.

Normal brew level is about 64 ounces.Can be set to what ever airpot you have.To decrease brew volume 2 seconds in programming mode hold down brew button 2 seconds to decrease.Then hold brew button until you here 3 clicks then let complete cycle.turn off red on/off red power switch to lock in time.Set white dip switch on control board to locked position.

Heating element is probably bad and water may be heating by blanket heater overnight.May be limed up .

If it has a newer timer look for a circuit board usually in the rear after taking off panel and looking for a small dip switch,usually white.Put position to set,turn on red on/off switch ,hold down brew button until you here 3 clicks then release to start brew cycle.When close to proper brew level turn of red on/off switch to lock in.Put dip switch on board then to lock position.

Could be something stuck in the brew valve or needs to be rebuilt.If not a possible bad brew timer.Rare that a brew switch is bad.

Inlet valve is leaking.Valve is located by removing front access panel.Can be rebuilt using p.n. 1111.0002 repair kit.You can verify by removing top lid and finding water leaking at fill basin tube.