With R to W jumper furnace works,but manually controlled,means I have to turn it off when it gets too hot.Because I jumped start,the thermostat is not working;it not in control.The HSI light is still flashing red even when the furnace is working..
T-stat has been replaced..Yes,I am jumping it at the furnace.
Hello,First of all on a Trane a slow flash = normal not in use.A fast flash = normal in use.Jumping at the furnace bypasses the wire also...and you could have an issue in the thermostat wiring.
Can you trace the wires and look for any poor connections/damage?Billy
I will ..thanks
Just moved the jumper from hf to t-stat..guess what?the new t-stat is defective!Thanks all