|Heartbeat LED pattern on solid
||The control is locked out and will auto-reset after 1 hour.
||Reset power to clear the lockout.
|Two LED flashes
||Pressure switch didn’t open.
||Obstructed pressure tubing; a pressure switch that’s stuck closed.
|Three LED flashes
||The low-pressure switch did not close or has reopened.
||Proper vent sizing; air leak; restricted vent; clogged condensate drain; low input gas pressure; excessive wind; improper pressure switch wiring; water in vent piping; disconnected or obstructed pressure tubing.
|Four LED flashes
||Limit circuit fault.
||Loose blower wheel; defective switch or connections; improper minimum- or maximum-heat gas input adjustment; dirty filter or restricted duct system; improper limit switch.
|Five LED flashes
||Abnormal flame-proving signal.
||Leaky gas valve; stuck-open gas valve.
|Six LED flashes
||Ignition proving a failure.
||Low inlet gas pressure; control ground continuity; gas valve defect; defective hot surface igniter; oxide buildup on the flame sensor; inadequate flame carryover; flame sensor mustn’t be grounded.
|Seven LED flashes
||Limit circuit lockout.
||Control will auto-reset after 3 hours. Refer to status code #4.
|Eight LED flashes
||Gas heating lockout.
||Gas valve stuck closed on control.
|Nine LED flashes
||Medium pressure switch, high-pressure switch, or PSR relay didn’t close or was reopened.
||Refer to status code #3.
|Ten LED flashes
||Correct line voltage polarity.
|Status codes 1 + 2
||Blower on after power up.
|Status codes 1 + 5
||Blower motor lockout.
||Control will auto-reset after 3 hours. Refer to status code #4 + 1.
|Status codes 3 + 5
||Gas valve fault.
||RED, YELLOW, or ORANGE wire at the gas valve.
|Status codes 4 + 1
||Blower motor fault.
||Blower failed to reach 250 RPM, or the blower failed to communicate within the prescribed time limits.
|Status codes 4 + 2
||Inducer motor fault.
||Proper vent sizing; restricted vent; failed inducer motor; improper motor wiring; a blockage in the tubing to the pressure switch assembly.
|Status codes 4 + 3
||The low or medium pressure switch is open while the medium or high-pressure switch is closed.
||Low inlet gas pressure; clogged condensate drain; improper pressure switch wiring; water in vent piping; low or medium pressure switch stuck open; disconnected or obstructed pressure tubing.
|Status codes 6 + 1
||Control will auto-reset after 3 hours. Refer to status code #6.