My gibson furnace is about 8yrs old and it was working fine heat was on yesterday morning but last night it stopped. Changed batteries in thermostat which in new(thermostat) but no heat. Checked the vents and no air was coming out. I took cover off furnace and saw that the red indicator light was blinking once every 3 seconds. what could be the problem??
Answers & Comments
Hi,
Look on the back of the bottom cover... it should tell you what the blinking means...
Here is a tip that will help you try to figure out why your furnace is not working.
Basic Furnace or Heating System Troubleshooting
heatman101