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Kiln not firing
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More details..
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 engaged
- Switch failure
Check controller
- Controller not switched on
- Loose connections
- Controller faulty
- Thermocouple circuit inoperative
- Fuse in controller blown
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Kiln does not reach temperature
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More details..
- 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
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Uneven heating
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More details..
- 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
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Kiln overfiring
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More details..
- Main control contactor fused in
- Thermocouple pushed back into the insulation
- Incorrect programming for the type of firing being undertaken
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Increased firing time
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More details..
- Ageing elements / broken elements
- Supply voltage low
- Worn door seals / top bung
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