Question about Bunn CWTF15
Water flow continues to run and will not stop when pot is full. Water flow will continue until second pot is filled?
Posted by Anonymous on
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 CWTF has a start switch activates the timer (analog or digital) board which turns on the water feed to the brew tank. This forces previously heated water out and sprayed over the ground coffee in the brew funnel. Coffee then drips into the decanter. Overfilling is caused by un-calibrated timer or interment timing.
* The timer comes in two types; Dial (old) and Digital. If it's the dial then a simple turn of the dial will make less or more water flow to decanter. You MUST re-brew (no coffee, but use funnel) into the decanter or pot that you plan to use. Don't mix up different size pots as the timer is only good for 1 setting. Turn dial and brew once to check. Keep checking with a brew after each adjustment. Do a final brew just to be sure.
* The digital timer is a bit more complicated to adjust. Sorry, too many switches and options to go into it here. Check Bunn.com for a manual (FREE download) on line. Several methods are listed. The fill and stop is the easiest one.
* If it does not adjust or won't keep the set time then. Replace 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 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. Call your coffee vendor for advice.
P.S. I'm assuming the brewer does eventually stop brewing. If water flows with no stopping then the fill valve is stuck open and needs to be replaced. Yes, others have mentioned to clean it but it will fail again and again. Better to replace.
Tip, Older timers usually are reliable. It may have been set for a larger decanter or pump pot. The pump pots come in 2.5L and 3L for the big boys. Decanters are 10 cup and standard 12 cup. Check your office as there may be an unused 3L pump pot in a cupboard that got put away for making "too much" coffee. Try a brew in this larger pump pot.
Posted on Jan 31, 2018
The coffee dispensing valve is stuck open. It may be due to Calcium deposits.
Descale the machine or manually clean the dispensing valve and the diffuser disc that unscrews to be removed. This diffuser is visible just above the coffee pot.
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a
Posted on Oct 18, 2014
there is also some chemical to flush thriufh a cycle called C.L.R. IT IS FOR CALCIUM LIME AND RUST ALOT OF HARD WATER DEPOSITS COME IN OUR DRINKINK WATERS.THE USE DISTILLED WATER AFTER YOU ARE FINISHED AND IT WILL NOT CLOG AS FAST
Posted on Nov 12, 2008
This sounds like normal operation of this type of unit.
Look at the brew funnel. is coffee coming out of it all the time during the brew cycle?
If so, then what you are hearing is the water supply solenoid cycling.
Posted on Jan 03, 2010
If u haven't cleaned it out using 3/4 vinegar to 1/4 water, some times this will happen. after running this thru ur coffee maker, (u won't believe the junk that comes out), then run full pots of water to rinse out (2x's). This should help it perform better.
Posted on Sep 12, 2010
First thing to check is that there is no blockage in the funnel. Next thing is check the spray head and make sure that it is not limed up. After removing the funnel there will be a round silver head that screws in above the funnel, it can be removed by hand but usually you need a pair of channel locks. If so you can clean the spray head with a wire brush. Also if that is not an issue you can purchase a deliming spring from http://www.google.com/imgres?imgurl=http://ecx.images-amazon.com/images/I/21IeXJoqjnL._SL500_AA300_.jpg&imgrefurl=http://www.amazon.com/Bunn-Commercial-Deliming-Spring/dp/B0032QNRH2&usg=__mJkJExy1qExfrZEEbtxW6EAQGSw=&h=300&w=300&sz=5&hl=en&start=4&zoom=1&itbs=1&tbnid=tHf1BPtEJIafsM:&tbnh=116&tbnw=116&prev=/images%3Fq%3Ddeliming%2Bspring%26hl%3Den%26gbv%3D2%26tbs%3Disch:1
WIth the deliming spring you need to remove the spray head and simply run the spring through the hole til you hit the water in the tank and pull it back and forth about 4 or 5 times. Also something siple make sure there is only one coffee filter it is easy to put two in. Hope this helps.
Posted on Dec 01, 2010
Sounds like your timer part #32400.0002.This is the new type timer which replaces the dial timer.Another thing is does this happen when you turn on the on/off switch? I would also check your liquid level probe in top of tank.Always a possibility bad liquid level board.If it only does this when you push the brew button the timer is bad.
Posted on Feb 11, 2011
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