Responded to fireplace having cycling issues. Customer stated he could get pilot lit and stay lit. When flipping switch on wall burners would not ignite. Attempted startup. Pilot had no issues lighting. Upon flipping switch burner ignited properly. Cycled burner multiple times with customer present. Advised customer issue seems intermittent, could be issue with switch or gas valve. Offered switch replacement as preemptive measure. Customer stated he will let go for now since fireplace is working. Will call back if issues persist.