Question about Vulcan GCO2D Gas Single Oven

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Problem again with the Vulcan GCO4C

Well I got the new ignition/spark controller board. Installed it. POwered up the oven and everything looked golden. I have spark, I had gas, I had flame, I had heat and then I had er-5 failure again. I have the shell off of the oven and can hear when the onboard regulator shuts off and then restarts intermitently. It does this for a few times and then finally shuts off again and does not re-open, soon after that I get the er-05 code. I have the oven set at 500, so I know it is not reaching that temp. I placed a thermometer inside to see if it was failing at the same temp. It was not, it failed at 350 the first time and then 250 the second. Any suggestions would be greatly appreciated, so far with your help I have gotten the oven to actually begint he process of working, in my book that is a great start. Thanks in advance for the help.

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  • thaddeus333 Jan 30, 2008

    Hi and thank you for your suggestions. The ER-05 code is bad ignition. Where would I check the ohms at on the probe, it is attached to the inside of the oven, correct? Please forgive my inexperience, first time doing this. Thanks again.



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Hi thaddeus,im the tech you spoke to in the first place.if you remove the bottom panel on the oven you will see screws on the left and right side,open the door and you will see 2 more screws.then pull the panel then have access to the will see the pilot assembly and 2 wires going to them.the thinner wire that goes to the probe is the flame sense wire.clean that probe up with emory cloth or a fine grit sandpaper.this should do the trick,let me know.

Posted on Feb 02, 2008


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I wasnt in on this from the begging but have you changed the safty valve on the burners and what code is er-5 havnt had no experence with vulcan but the regulater dont run the gas the safty valve does and have you checked the probe in the oven at 70 degrees it should be 1200 ohms

Posted on Jan 30, 2008

  • robert samples Jan 30, 2008

    no problem my first time with a vulcan lol the gas safety valve could be considerd to be part of ihe ignition systems it opens off the ignighters yes the probe is in the oven cavity



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