I traced the T-stat wires from the furnace to the T-stat. There was a splice in the line in the wall. The wires were bare and wrapped in old painters tape. The tape came apart and the wires were touching. I ran new wire and reconnected the wires and now it runs great !
Thanks for your help.
Thanks for the reply. The T-stat was working fine before this started happening. I didn't change anything on the wiring but I did check and tighten all the wires to make sure they weren't loose. Still the same.
My gas furnace blower will not stay off when the t-stat reaches set temp. Here's what's happening. When I turn the t-stat to heat both the blower starts slow then half a second later it's on high. Next I can hear the flames come on. In about a minute heat comes through the vents. Once the house...