A continuous ticking, or just an occasional tick? Electrical relays tick when the thermostat tells the heating dooverlacky to turn on or off...? I also get some ticking that isnt related to the heating light coming on and off, which I assume must be due to metal expanding/contracting. Mine probably ticks about every 30-60 seconds when its left on. I wouldnt say its loud, although it was annoying my wife the other night (she kept going to turn the oven off).