Found smallish puddle on floor under and next to oil burner. Never have seen this in the past; nothing vividly leaking, and no obvious source. Heavy rain 2 days ago, and we have had seepage in basement in the past, but never in that specific area. Boiler seems to be running fine. Suggestions?

I have a green mountain boiler that is about 7 years old. It's been maintenance free up to now. It has a electronic ignition autopilot light. About a week ago it didn't fire up The autopilot light came on for few seconds then went out. I cut the boiler off for a few minutes and then turn it back on. The auto pilot stated lit and the boiler fired up. The same problem happened tonight and again when I turn off the boiler and turned it back on it worked. I am trying to troubleshoot it before the problem get worse. I am thinking maybe the t[color=#0f0f0f]hermocouple[/color] is faulty.