Delonghi DCU72 Light goes on and unit does nothing

I have a DCU72 which had a chipped tube (TG007) which seems discontinued.
I purchased a TG039 from www.thegourmetdepotco.com, and this seems a usable replacement.
The only caveats are that the tube is slightly shorter (7 inches) than the previous one,
so I cannot fill the pot to the 60 cup capacity (keep at about 50-55 cups or less).

The other option I did not try is to just not have a coffee level tube, and block the hold in the spigot
with a plastic disk the same diameter as the original tube.

USING YOUR PERCOLATOR
1.Wash the Percolator thoroughly before using for the first time.
(See "Cleaning Instructions" section in this manual.)

2.Remove Cover, Basket, Spreader and Pump Tube. Use cold, fresh
tap water to fill Percolator. Fill according to markings on inside
of Percolator for number of cups desired. Use cold tap water -
the automatic brewing cycle is timed to begin with a cold
water start.
NOTE: The bottom of the Pump Tube Spring marks the maximum
capacity of the Percolator.

3.Wet Coffee Basket to help keep small particles of coffee from sift-
ing through. Place Basket on Pump Tube. Add desired amount of
regular or percolator grind coffee to Basket.

4.Place Pump Tube with Basket into Percolator so bottom of tube is
set into Center Well. Place Spreader on top of Basket and snap
Cover onto Percolator. Attach cord to Percolator and plug into
standard household 120 volt AC wall outlet. Brewing begins
within seconds and continues at a cup-a-minute speed

5.When coffee brewing is complete, percolating will stop. The
Percolator automatically switches to "KEEP WARM" setting to
preserve fresh-tasting coffee at hot, ready-to-serve temperature.
For best flavor, remove Coffee Basket, Spreader and Pump Tube
when brewing is completed.

Could it perhaps be a limescale indication? If so add descaller and hold start button for 5 seconds.

Hi,
The thermostat of the heating element are bad.... they are not economically repairable...

heatman101

Between 45 minutes to 60 minutes to brew that amount of coffee.

Water Level ////Amount of Ground Coffee

42 Cups --2 ½ Cups
36 Cups-- 2 Cups
30 Cups- -1 ¾ Cups
28 Cups --1 2/3 Cups
24 Cups --1 ½ Cups
22 Cups --1 ½ Cups
18 Cups-- 1 ¼ Cups
12 Cups --1 Cup

1. With basket and stem removed, fill coffeemaker with COLD water to desired level using the cup markings on inside of coffeemaker as a guide. Do not make less than 12 or more than maximum capacity of the coffeemaker at one time.
2. Place stem into heating unit in bottom of coffeemaker, then put basket on stem. Spread the recommended amount of ground coffee evenly into the basket. See chart. Use regular electric perk grind coffee or coffee ground for all coffeemakers. Do not use drip or finely ground coffee as flooding of the basket can occur.
3. Turn cover in place on coffeemaker. To reduce coffee spills, especially if coffeemaker is tipped over, make sure cover has been turned clockwise until it is completely secured in the handle slots. (Note the arrows on the cover for correct turning.) The cover temporarily reduces coffee spilage if coffeemaker is tipped over, so care should be used when moving coffeemaker.
4. Place coffeemaker on a dry, level surface. Attach cord to coffeemaker and plug into a 120 volt AC electrical outlet ONLY.
5. Coffeemaker stops perking automatically. (Each cup of coffee requires about 1 minute brewing time) Serving light will glow when coffee is ready. Before serving, use a hot pad to remove cover, then carefully remove stem and basket from coffeemaker as coffee and grounds are HOT. If not removed, bitter oils from the coffee grounds will drip into coffee. Replace the cover making sure it is completely secured into the handle slots.
6. Coffee will remain at serving temperature as long as coffeemaker is connected to outlet. (if you have an insulated coffeemaker, the sealed-air insulation will keep coffee hot for up to two hours without electricity.) To serve, place cup and saucer under faucet and press down on handle. If a continuous flow is desired to fill a carafe, lift handle straight up until it locks into open position. When approximately one cup of coffee remains in coffeemaker, disconnect from outlet.
TO MAKE MORE COFFEE: If another pot of coffee is desired right away, partially fill coffeemaker with cold water to reset the thermostat. Pour out water, refill with cold water and repeat steps 1-6.
TO HEAT WATER FOR INSTANT BEVERAGES: Plain water may be heated in your coffeemaker for use with instant beverages. Simply fill the clean coffeemaker with cold water to the desired cup level, and then place the stem and empty coffee basket in place. Using the stem and empty basket will heat the water more uniformly. Secure cover in place and plug coffeemaker in. Heat water until perking stops and serving light comes on. Unplug coffeemaker when less than 1 cup remains. Other than making coffee or heating water, no other liquid should be heated in coffeemaker as damage to heating unit can occur.
When coffeemaker is used to heat water only, the metal inside will discolor which is normal and does not affect performance or the water heated in the coffeemaker. Refer to Special Cleaning Instructions in this manual for removing discoloration as well as mineral deposits, which form inside the coffeemaker when heating water. If these deposits are not removed, pitting of the metal inside may occur and result in damage to coffeemaker. Refer to the cleaning your coffeemaker section

What to Do If Your Keurig Won Brew Cup Barista

I had the same (sight glass tube replacement) problem, but DeLongi gave me the number of a parts supplier that has them available.  Call 1-800-436-5415.

Be sure the red rubber gasket is in place and clean (ridge side in) and bottom water cup is screwed firmly on to avoid leaking.
HOW TO USE:
1) Fill the bottom water cup with cold water up to the inside lip.
2) Set funnel into bottom water cup
3) Fill coffee basket with expresso grind coffee and level off. (Do not tamp or pack). Make sure it's filled to the top.
4) Place filter onto coffee basket and set coffee basket into funnel
5) Place brewer over bottom water cup and screw firmly into place.
6) Place unit with lid in the center of a microwave oven set on high for 1-1/2 minutes. If boil over occurs, reduce the brew time in 10-second increments until no boil over occurs.
7) Grasp handle to remove unit from microwave when finished brewing.
8) Remove lid and check the level of espresso in the brewer cup. Standard brew is at least 2 oz. If you don't have this level brew, replace lid and microwave on high another 10 seconds. Wait 20-30 seconds for bubbling to stop.
CLEANING/ADDITIONAL BREWING:
1. Under cold running water, unscrew the bottom water cup. CAUTION: It is normal for some water to be left in the bottom water cup. Both the coffee basket and any water in the bottom water cup will be extremely hot! If you prefer, allow the unit to cool for at least 3 minutes before unscrewing it.
2) To brew additional espresso, rinse Funnel, coffee basket and filter, then repeat brewing steps 1-8 above.
3) Parts are top rack dishwasher-safe -- hand washing filter is recommended.