I've done what you recommended in your last reply, everything was clean, no obstructions. Before I was getting a very small flame on the pilot, like it was starved for gas, now the pilot will not light at all and the igniter is working, getting a spark. Could it be the control unit that is bad, not letting gas get to the pilot? I've check the gas line to the pilot and it's clean, I can blow air through it. Any info would be appreciated, thanks. The Thermostat/Control Unit is $104.22 at my local Sears Parts Center.