First of all thanks in advance for any advice!
So.. Raypak rp2100 266k Heater calls for heat, and I hear the audible sparking, then Heater ignites without issue...
Every 30 secs thereafter I can hear it sparking again, along with "spk" on the readout.
Don't think this is normal.. Even though the heater is on and functioning!
Please advise if this is an easy fix, as this is an older heater and I don't want to spend a great deal of money fixing it..