When gas furnace is on do you constantly see fire?

Usually if there is a call for heat.

Quote:

---

Originally Posted by hvac1000

Usually if there is a call for heat.

---

I only asked because, I was awaking by the cold air coming out out the air vents instead of heat. I went to the furnace and did what it said on the furance to do as far as the pilot light goes and, when the pilot light was lit and the burner was flaming fire it only lasted a short while and then blew out. Come to find out the sensor needed to be clean to keep the connection going.
Your answer was very helpful. Thank you!;)