This is commercial and the water drips instead of flowing,took 20-30 min to make coffee, how can i clean?

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.
* It's not often this momentary brew switch goes bad even though it's pressed many times a day.
* Check the on/off switch. Most models will light up when switched on.
* 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 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.
Aloha, ukboy57

If you have hard water it's most likely still plugged with lime and calcium build up. After vinegar got though did u let it sit for a bit before rinsing the brewer with fresh water and was it brewing normal. If so then I'm guessing it's got stuff plugging it still an may need to be delimed several times if the vinegar was still in system from not enough fresh water rinsing I bet after sitting when u turned it on to brew a few small pieces got pushed though and plugged brewer again. Buy some CLR and run it though. Just make sure you rinse a lot of fresh water though. That's what we do for our commercial air pot brewers when they get plugged. Just keep trying the deposits should break down and finally work it self out with CLR or viniger. Hope this helps

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.***
* Since no brand or model given. I suspect this is a commercial coffee brewer as it probably has a plumbed in water line. Bloomfield, Curtis, and Bunn are the most common. I'm using Bunn CWTF for this example but it covers most other brands too.
* 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. Under filling 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.
Aloha, ukboy57
P.S., 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 pump pot or small decanter in a cupboard that got put away for making "too little" coffee. Try a brew in this smaller pot. Any change in pot size requires an adjustment to the timer. This is the only way to get "Less" or "More" out of the brewer. (Yes there is a way to use the "Pour Over" function for one time special brews. Check the manual for this option.)

It depends where the water just "drips out". It could be a leaking hose, or it could be the parts weren't put back together properly after you cleaned it. More information would be helpful.
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Coffee maker is not pre-heating the water.The brew cycle should take about two minutes, and the coffee should be 200°F when it comes out, that is why it's weak. To clarify, is it a commercial model, or a home model (like the one pictured)? Home models will have a 'vacation switch' on the side of the unit that needs to be on to get the water pre-heated properly.

BUNN G-3 IS A RETAIL COFFEE GRINDER and You are talking about a COFFEE BREWER Any way

It sounds like a bad thermostat and needs to be replaced.

Hope you can help. Water runs though pot but the water is not hot whatsoever. Heating element burned out?
Commercial Brewer 8543

Mine just started to do the exact same thing. So I decided to clean it using the "Clean" program and just water. I put the brewer through the cleaning program 3 times - each time it would brew water from 12 cups to 8 cups, I'd tap the brewer on the countertop, it would brew from 8 cups to 4 cups, tap it again, and it would brew the remaining cups. So, I called the Mr. Coffee help line (800-672-6333). The most-likely problem is that the hose is no longer attached in the water reservoir. The help line suggested that I take it in to a service center. I live in Urbana, IL and the closest service center is in Oak Lawn, IL - 2 hours away from me!!
Here is my solution:
1) Buy another coffee brewer.
or
2) Smash your current Mr. Coffee brewer into a million pieces (this relieves stress) and go buy another coffee brewer (probably stay away from Mr. Coffee products).
Hope this helps.
Frustrated in Urbana

In addition to running vinegar thru your coffee maker, remove the sprayer at the point where the fresh coffee comes out to enter the carafe. It is a disk about the size of a half dollar with several small holes in it. Use a small piece of wire to clean out each of the holes and you should have the speed back. good luck.