Frequently Asked Questions

How do I clean the inside of my urn or any other stainless steel appliance?

Most hot water urns (or any other appliances which heat water) collect water born particles on the inside surfaces of the unit, which can have an effect on the taste as well as being harmful to the heating element and outlet faucet operation.

To dissolve these particles and clean the appliance satisfactorily, follow these instructions:

1. Fill your appliance to the desired water level (no less than 1/3 full)

2. Sprinkle approximately 75 grams of CROWN Stainless Steel Urn Cleaner into the water

3. Bring to the boil and maintain the boil for 10 minutes

4. Allow the water to cool to a manageable temperature

5. Fill a cup/mug/jug from the urn tap and then tip that water into the sink

6. Unplug the urn

7. Pour out the urn water using a swirling motion

8. Rinse the urn interior with cold water

9. Go back to using your urn as per normal

NOTE: If your appliance is still not clean, follow the instructions for a second time but this time, allow the water to cool and sit for 2 hours. With the appliance unplugged and the water cool enough, give the inside of the unit a scrub with a standard dishwashing cloth (NO STEEL WOOL). Rinse with cold water and go back to using your appliance as per normal.


How do I replace a broken water level tube on my urn?

1. Unscrew the broken off threaded piece inside the square elbow with a small bladed screw driver pushed into the plastic and turn in an anticlockwise direction until the broken piece comes out completely.

2. Fit the new water level tube with the top end into the top bracket first then screw the threaded end into the square elbow in a clockwise direction until it won't go any further inside.  It is highly recommended that you smear some food-grade clear silicon to the thread to ensure you achieve a water-tight seal.

3. Test with water for leaks, if OK your urn is ready to use again; if not, contact CROWN.


Do I need to replace the whole tap assembly on my appliance if it is leaking?

In most circumstances, the answer is no. You only need to replace the whole tap assembly if:

1. The tap body, handle or top-nut has been damaged; or

2. The internal replacement parts for your current tap, are obsolete.

Therefore, you will generally only need to replace internal components which consist of a silicone cup, a spindle and a spring. We can talk you through the replacement process if you need assistance.

Should I turn-off my wall mounted boiling water unit over the holiday period?

It is better to leave the unit on. The unit components are designed to remain hot at all times. If you want the longest possible life out of your unit without the need to experience downtime and replace parts, keep your unit switched on at all times.

Trouble shooting a wall mounted boiling water unit (CRN2.5 to CRN30T):

NOTE:  The following "ACTION" suggestions assume the "MOST LIKELY CAUSE" has been verified by the repairer.


Leaking tap

No power 




Not heating   







Continuously boils

No water in the tank      

No water from the tap


Tap insert is worn

Unit is not plugged in

Circuit breaker has tripped

Faulty cut-out switch (on vent pipe)

Faulty circuit board

Faulty temperature sensor

Faulty element

Faulty element cut-out switch

Faulty cut-out switch (on vent pipe)

Vent pipe has not been correctly plumbed

Faulty temperature sensor

Stop-tap on the wall or bench etc is not turned on

No power to the unit

Faulty water valve

Faulty circuit board

Faulty water probe sensor

No water in the unit

Tap insert is worn


Replace tap insert

Plug in

Reset circuit breaker

Replace cut-out switch

Replace circuit board

Replaced sensor

Replace element

Replace cut-out switch

Replace cut-out switch

Have the vent pipe running to atmosphere (ie a tundish or into a sink or drainboard) with no kinks at all in the pipe-work

Replace temperature sensor (and heat transfer paste)

Turn on the stop-tap

See "No power" above

Replace water valve

Replace circuit board

Replace the sensor(s)

See "No water in the tank" above

See "Leaking tap" above