The blower doesn't start on "Auto"
Please someone help me.
My furnace Lennox G20Q3/4E-100-5 behaves as follows:
1) Fan is on "Auto"
2) Thermostat calls for heat
3) Green light comes "On" on IPI module and then burner comes "On"
4) Flame occurs
5) Blower doesn't come "On". After a while, the burner stops due to safety. It retries again, and same thing happens.
6) When the burner is "On", I put the blower on "Fan On" mode and the furnace keeps running until it meets the thermostat setpoint. Then the burner goes "Off". But, the blower keeps running. Because it's on "Fan On" forced mode.
Please note the A/C worked fine during the summer when the fan was on "Auto" mode.
Please advice me. I am thanking you in advance for your assistance.
Thanks, Ravi :confused: