KILN NOT FIRING?

Important safety notice: Kilns operate at high temperatures and mains voltage. For safety, turn off and isolate power, let the kiln cool completely, and keep the area clear of combustibles. Internal inspections, repairs, or testing should only be carried out by a competent person/qualified electrician. Use this page to identify symptoms and share them with our service team so we can advise the correct next step.

Check main electrical supply switch

• Fuse blown / breaker tripped
• Cable connection failure

Check kiln controlling contactor

• Loose connection
• Contactor failure

Check kiln door / lid switch 

• Switch switched on
• Switch incorrectly engages
• Switch failure

Check Controller

• Controller not switched on
• Loose connections
• Controller faulty
• Thermocouple circuit inoperative
• Fuse in controller blown

Kiln Does Not Reach Temperature 

• Heating element failure
• Heating element broken in chamber
• Heating element broken at connection with electrical supply cable to element
• Ageing elements
• Too much weight of product and kiln furniture
• Programmed heating rate set outside the kiln capabilities
• Top bung left out during the total up cycle
• Badly fitting (worn) top bung
• Worn door seals

Uneven Heating 

• Heating element(s) faulty
• Top bung left out during the total up cycle
• Badly fitting (worn top bung)
• Worn door seals
• Uneven placing of ware within the kiln chamber
• Too densely packed ware in the chamber

Kiln Over-firing 

• Main control contractor fused in
• Thermocouple pushed back into the insulation
• Incorrect programming for the type of firing being undertaken

Increased Firing Time 

• Ageing elements / broken elements
• Supply voltage low
• Worn door seals / top bung