A furnace technician recently checked my furnace. He pulled the tube off the pressure safety switch and told me the fan motor should stop. I then replaced the switch and tried it again. Same thing. I called him and he said "no, I said the flame should go out". So I pulled the tube and watched the flame for 30 seconds and it did not go out. Which is correct and do I still have a problem, ie what should occur if you remove the pressure from that switch. Thanx in advance.
Depends if it has 2 hoses to it or 1. If one then it should shut off the burner. Post the model # here. Is it a high efficiency unit with plastic venting pipes or one with a metal pipe to the chimney? A picture of the furnace and switch will help also.