If you're looking for help fixing your Ruud Furnace, look no further! Our comprehensive Ruud Furnace error code guide will explain common issues, provide tip.. STATUS LED: 1 Blink. RESULT: Ignition failure, 1 HR lockout. FIX: Reboot system.
Step 2 - Check for Basic Issues. Ensure the furnace is receiving power and the breaker is not tripped. Make sure the thermostat is set to heating mode and the desired temperature.. CODE: Four LED flashes The pressure switch is stuck closed, or the switch won't open. Check for an obstruction in the pressure tubing. CODE: Five LED flashes. N/A. CODE: Six LED flashes. Line and Neutral are reversed. The control board or the furnace's ground could be defective. Ask for professional help right now!