My bunn pour o matic coffee brewer will not brew. all burners get hot but it will not pump the water out into the filter basket. What could be the cause?

You should be able to pick up a replacement/new pot at your nearest Restaurant Supply store. Make sure you get a 64 oz./ 1/2 gallon pot.
Before plugging in your brewer, unscrew the sprayhead located just above where the filter basket sits and replace the basket, pour 3 pots of cold water through the opening on the top if the brewer is empty. This brewer has a reservoir that holds about 2 1/2 pots of water at brewing temperature when heated. Make sure you put an empty pot under the filter basket after pouring in the water. Water will flow from the brew basket when the reservoir has reached its capacity. Once water flows you can then plug in and energize your brewer and replace the sprayhead. It will take about 15 to 20 minutes for the brewer to reach brew temp, you will hear the heating stop. Put an empty filter and a dose of coffee (I recommend starting with a heaping measuring cup of drip ground coffee) into the filter basket, lightly shake it level, replace the basket and pour through 1 full pot of COLD water in the top. For best results pour the brewed coffee into a pre-heated thermal server if you plan on holding the coffee for more than 10 minutes or so.
Enjoy!

I recommend slowly pouring in about a half a pot of cold water without coffee in the filter basket 5 or so minutes before you brew in the morning. There are 2 good reasons to do this-
1. Overnight you are having some evaporation due to the fact that your Bunn brewer has a reservoir that keeps a couple of pots worth of water at brewing temperature... a better temp than most "home" model brewers. This will top off the reservoir and you will not "short pot" except for the amount that the grounds themselves hold back.
2. Also overnight, due to the fact that the water is kept hot, the oxygen can dissipate from the water in the tank. Topping off with fresh water will mean a fresher first pot.
The Bunn brewers have a low wattage/keep warm heater so the actual heating element isn't doing all of the work over those long periods... it only kicks on when the temperature in the reservoir drops considerably (like after brewing). Be sure to let the brewer heat back up before brewing (you will hear it stop heating)
Hope this helps.

This brewer has a 2 1/2 pot reservoir. You should NOT plug in the brewer before the reservoir has been topped off. Pour 3 pots (one at a time, every minute or so) through the screen with a pot under the filter basket. Wait until the water flows from the basket and only then is it safe to plug in the brewer. The reservoir holds HOT water until you are ready to brew and then, by pouring in a pot of cold water, you will be able to brew.

This machine has a reservoir that holds about 2.5 pots and keeps them at brewing temperature. Therefore you should pour in 3 pots (with a pot in place under the filter basket) until water flows from the basket. Then, and ONLY then, it is safe to plug in the brewer. If you plug in the brewer BEFORE filling the reservoir you will burn up the heating element and will have to have it replaced.
After the initial filling and heat up (about 20 minutes) you are ready to pour through a pot of COLD water through and brew.

Bunn Home brewers don't perculate. They work the same way that commercial brewers do. Fillit with water, let it heat for about 20 minutes, then put your filter and coffee grounds in the funnel, pour a pot of water into the machine, put the pot on the warmer, and let the water run through. Then enjoy a nice hot cup of coffee.

YES.

The unit has a tank used to heat the water for brewing.
When you add more water, the unit starts the brew cycle.

COFFEE PREPARATION PROCEDURES
1) Place filter into brew basket.
2) Put the proper amount of coffee into the filter.
3) Slide the brew basket into holder.
4) Place empty decanter on warmer located directly under the brew basket and turn corresponding warmer switch ON.
5) Pour decanter of fresh water through pour-in opening at top of brewer.
6) Hot water will be delivered through the sprayhead. This distributes the hot water evenly over the coffee bed within the brew basket. The coffee will drain from brew basket into the container below.
7) Red light indicates warmer is ON.
8) Before brewing next pot, remove brew basket from brew rails and dump filter into waste basket.

Please rate this a fixya

The silicon seal inside the coffee maker tends to disintergrate. Bunn Inc. does not sell parts for the inside of the coffee makers, but a seal kit can be purchased through a small appliance repair center or repaired for a small cost. Kit is about $8.00 at most places.

The pour-over type of Bunn coffee brewers require several pots of water to fill an empty tank.
1. While unplugged, pour in two and a half to three pots of clean water (put an empty pot underneath the brew basket). When the tank is full, water will come out of the brew basket.
2. Plug the unit in and wait for it to heat - about 5 to 7 minutes. These brewers are meant to be left plugged in all of the time to keep the tank water hot. You will probably heat some rumbling noises which is normal as the water heats.

If for some reason the water isn't hot after 10 minutes you will need to check the thermostat. Unplug the machine and take the screws out of the top. The thermostat has a little dial or a t-bar that you can turn. All the way left is off and all the way right is boiling. Turn this up about 90% of the way and put the top back on the machine and plug it in. If it gets hot, you are ready to brew. If it doesn't get hot, you may have blown the limit thermostat and will need to replace it.

The limit thermostat isn't the same as the thermostat. It is a ceramic and metal item that senses if the tank gets too hot from having the unit plugged in without any or enough water in it. It is inexpensive and relatively simple to change.