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issue. First I’ll need some more info so I have a more complete picture of you situation.
What is the brand and model number of your furnace?
Try turning power off to clear code,Then back on.Then call far heat and see how far in sequence below it goes.
The normal sequence of operation:
Inducer vent motor comes on
Pressure switch closes
Main circulating blower comes on
If furnaces fails anywhere in the sequence we should get an error code by blinking lights on the control board. Turn power off and back on, then call for heat.tell me how far in that sequence it goes and what error code is on first failure We will go from here.
Model on unit?