KNOWLEDGEBASE

What do I do if the display is normal but the kiln won't heat up?

Programming

  1. Make sure you have programmed the kiln properly and it is supposed to be firing. Do you have a Delay Time or a Preheat Time in your program? (Hit Review Prog button to find out).

Wiring

  1. Unplug kiln or disconnect from live power by turning off circuit breaker or fused disconnect switch. Open panel. Check all power wires for firm connections.
  2. Visually inspect the power wires coming from the Power Terminal Block to the inputs of the Power Relays. Reseat all the spade connectors to rub off any oxides and to ensure a good connection.


Control Board Outputs

  1. It is possible that the internal switches on the control board could be bad. You can test that by checking to see if you find voltage (12 volts DC) between any of the output contacts on the control board to ground (any green wire). CAUTION: This test should only be done by an experienced person familiar with electricity and its dangers.

Bad Power Relays

  1. You should be able to hear contactors going on and off with a clicking noise when you first turn on the kiln and it is supposed to be heating up. If not try turning the kiln off and then back on again and restarting the program. Of course if you don’t hear the relays it only tells you that they aren’t firing. The problem could be in the control. For instance, it might not be telling the relays to fire. If you do hear relays and the kiln is not heating, then you know the problem is in the power circuit AFTER the relays.
  2. With power on and panel open check voltage before and after each of the contactors while the kiln is firing. CAUTION: This test should only be done by an experienced person familiar with electricity and its dangers.

Bad Elements

See troubleshoot-elements.pdf.