It started when the electrode of one burner (x-lo) won't stop from igniting. Also blue lights turns on from time to time. I tried changing the potentiometer since i can hear clicking every few minutes even when not in use.

After changing the potentiometer by removing the screw of both valves (i can smell gas upon removing the screw), the blue light keeps on lighting but the main problem is the gas does not come out of the nozzle. SO even if i use a match to light the burner. There is no flame. Any suggestion will be very much appreciated. Thank you.