I have an Empire direct vent heater (model DV-35-2SG) that I use to heat my garage. It had a weak pilot flame, just barely reaching the thermopile. I cleaned the orifice and pilot burner but it made no difference. I replaced the orifice, pilot tube,pilot burner and thermopile. Now the flame has too much yellow and doesn't warm the thermopile enough to keep the pilot solenoid open. Does anyone know if there is an air intake that needs to be cleaned on this pilot burner? Any other ideas what the problem might be?