Lost instructions. Do not know how to set clock. Timer goes off several times during coffee making process. Now pot will not fill past 8 cup setting when directed to make 12.

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.***

Most commercial (plumb in water line) 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 your MFR online for a manual (usually a FREE download). Several methods may be listed.
* 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, if you have a "Pour Over" function for one time special brews. Check the manual for this option.)

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

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.)

Issue with Element... check thermoresistor ..possibility of crack on the Element,,,

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.

The amount of water you put in the carafe isn't the same amount you'll get out of the coffee maker, as some of the water is normally lost as steam vapor during the brewing process.

I would also look at the water level gauge inside the reservoir or on the sight gauge to make sure I have added the right amount to make the amount of brewed coffee I want.

As to the filter pre-soaking issue, it shouldn't matter since you likely made several pots since then and the filter has likely expelled any residue already. I would run a full pot of just water with a filter in the basket, just to see if you're getting a full carafe after brewing, making sure you have a full reservour to begin with.

As to the grind of the coffee, I find that a medium coarse is best for all but expresso coffee. However, you might want to experiment with your grind settings until you find the setting that makes the coffee to your likeing and taste. Coffee is all about what you like to drink, so take some time to find what you enjoy.

I use a high-end filter for all my drinking and coffee brewing water to get the best possible taste as it does make a difference.

My nieighbors have the same coffee machine and use the same coffee brand, etc., but don't filter their water. They've noticed the difference and always comment that they need to get a filter for their water.

When I run white vinegar thru my machine, I always run at least two (2) full pots of plain water thru the unit before I start making coffee again, to rid the reservoir of any vinegar residue.

Hope you find this helpful and best regards!

click the link below and download instructionguide and manual: http://useandcares.hamiltonbeach.com/hbuc.asp

thanks and please do not forget to accept the solution.

My second one just died, and I am very sad, but I can help you with your question.
First you have to set the time. Do that by pressing the hour or minute buttons until the time blinks. Then you can press the buttons to set the time. AM/PM are differiented by a red dot coming on in the time display. You can set that as preferred.
To set the timer feature, press the time button until the time blinks. Then use the hr and min button to set your timer setting. Pay careful attention to match the am/pm button with what you want.- if you don't you will be 12 hour off. To use the delay, set up the coffee pot, then push time. The red time indicator will light. If you are using ground coffee press the mill button. If it is lit, the mill will not turn on. This goes for either timed brewing or present tense brewing.
THe coffee pot has a timer - it will shut itself off after 1 hour. If you want to restart it, just push the mill button and press the on/off button.

You can get the instruction manual for your machine at saecooutlet.com, Click on user manuals and then select your machine.

To set the clock, hold the hour or minute button until the display flashes then adjust the time.

There is a brew timer on the left side of your machine near the heater switch. you need to remove an access panel to access it. turn this down a little, let the water heat up, then try another brew. Adjust as needed, brewing another pot between each setting.