Question about GE Profile Harmony DPGT750GC Gas Dryer

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I have a problem with the dryer not heating up. According to error codes I replaced the blower motor which it said was not getting up to speed. That error went away. The next error said to check or replace the inlet thermistor, which I did. After replacing it, it still says check or replace inlet thermistor and then it appears no gas is flowing. I ran the dryer with the front panel off and see that there is nothing igniting and do not smell any gas, it stays dark and cold the entire time. Upon deeper inspection, underneath my gas valve unit I found a ceramic type white pin with a flat shaft encircled with what looks like a ceramic cracked black/grey spring around it lying underneath the gas unit like it might have fallen out of something. Can anyone identify or help? A few more parts and I'll be up to the cost of a new dryer.... Thank you

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