GE Harmony gas dryer intermittently heats/doesn't heat
I have a GE Harmony DPGT750GC1WW gas dryer. Over the last few months, it would intermittently not heat up. Now, this occurs more often than not. I took off the front panel and turned it on. After running for a few minutes, nothing happened. I turned it off and then back on a few minutes later. The ignitor coil turned bright orange and the gas lit up. The gas then turned off about 20 seconds later. The dryer kept running. A couple of minutes later the ignitor started to glow in the center for a few seconds but then became "cool" again without any gas lighting. I let it run for a couple more minutes, nothing happened.
I don't know if I need to replace the ignitor or the gas valve. Is there a way to test these two parts prior to replacing them (especially since they are each well over $100). Thanks
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