A: The lid and inner lid gasket should be inspected yearly for signs of wear such as cracks or discoloration. The lid and inner lid gasket are available as replacement parts that may be purchased on our Zojirushi Parts & Accessories page. Please check the cleaning and maintenance section of your manual for instructions on how to replace the inner lid gasket.
A: The reddish staining is caused by the natural occurring iron mineral in water. Using water with high mineral content may cause an accumulation of iron to occur if cleaning is not performed with enough frequency, or if water is left in the unit and not thoroughly dried. Although this is not a hygienic problem, it is recommended to clean the inner container periodically every 1-3 month with citric acid. If using bottled lemon juice or white vinegar then more frequent cleanings should be performed. Please refer to Question 15, "How can I clean the water deposits in my Water Boiler & Warmer?" on instructions on citric acid cleaning.
A: Zojirushi water boilers are tested to function at an altitude of up to 5,000 feet above sea level. The water boilers are programmed to reach boiling point at 212°F and at higher elevations where the boiling point is at a lower temperature, the water boiler may not function properly.
A: The water boiler is designed to heat up the water to keep it at the selected keep warm temperature. However, if it is continuously reboiling it may be due to using it at a higher altitude (see Q4, “Can I use a Zojirushi water boiler at higher altitudes?") or if there are mineral deposits on the inner liner. First, please try performing a citric acid cleaning cycle as instructed in the manual. If this doesn’t help, please reach out to our Customer Service Department for further assistance.
A: It is not uncommon for our customers who use a charcoal-based water filtration system to see black specks in the water due to the charcoal/carbon filter. The specks come from the filter and not from the water boiler.
A: Replacement parts may be ordered from our online Zojirushi Parts & Accessories page or by calling our Customer Service Department at 800-733-6270, M-F, 8:00 a.m. to 5:00 p.m. PST. Please have the model number ready when calling.
A: A water boiler & warmer is a kitchen appliance that keeps water at a constant hot temperature for hot drinks and other culinary uses. You simply fill the boiler with water and plug it in. It boils the water and keeps it at a set temperature all day long. With a water boiler & warmer, hot water is ready all day at the touch of a button for hot tea, instant coffee and instant noodles. Each model features different hot water temperature settings depending upon your needs. Some also utilize vacuum insulation to keep water hot without the use of electricity. See Water Boiler & Warmer. Also see Question 11, "What are all those temperatures for?"
A: The multiple temperatures can be used for different beverages and foods. Here is a sample:
212°F and 208°F: Best for black herbal teas, houjicha pour over coffee, instant noodles 195°F: Best for oolong tea and white teas 175°F: Best for green teas like Sencha, genmaicha, matcha 160°F: Best for delicate, high quality green teas like gyokuro
A: It depends on the temperature of the water and the amount, but it usually takes 30 to 40 minutes. The water boiler & warmer is not meant to boil water quickly, but to keep the water at a steady temperature all day long; that is why most of the models have a timer. Please see Question 13, "How does the timer work?" for more information on the timer.
A: By setting the timer, you can have hot water ready within a specified time. When the timer is set, the electricity is automatically cut off until needed to heat the water. It's perfect if you set it before you go to bed, so hot water will be ready for instant coffee or oatmeal the next morning. It also saves energy by not having the water boiler & warmer on all night long.
A: The descaling mode cleans the inner container by reboiling the water with Zojirushi's Inner Container Cleaner (CD-K03E) or citric acid. If the inner container still becomes scaled, please see Question 15 for "How can I clean the water deposits in my Water Boiler & Warmer?"
A: We recommend you clean the inner container periodically with Zojirushi's Inner Container Cleaner (CD-K03E) or citric acid every 1 to 3 months. You can purchase the cleaner from our online Zojirushi Parts & Accessories page or by calling our Customer Service Department at 800-733-6270, M-F, 8:00 a.m. to 5:00 p.m. PST. Follow these instructions to clean with citric acid, or visit our YouTube page to watch a video:
1. Put 1 package of citric acid CD-K03E in a cup and add warm water to dissolve. Pour it into the inner container and fill with water to the maximum water level line. The cleaner may also be substituted with 1/2 cup of lemon juice from concentrate. If using freshly squeezed lemon juice, please be sure to strain first, so the pulp does not get caught in the pump and damage the boiler.
2. Close the upper lid, insert the power plug and press and hold the REBOIL button for more than 3 seconds. This will activate the descaling mode.
3. Once cleaning completes, unplug the power plug, detach the upper lid and dispose water where indicated "EMPTY FROM HERE."
4. To remove the smell of citric acid, fill the inner container with water. Boil and dispense about a cup of hot water, allow to cool, then dispose the remaining water.