Furnace Alarms and Alerts
Which Alarm do you have?
Reading Alarms and Alerts on the furnace control board.
The ideal location to read alarms or alerts is at the EcoNet thermostat. However, knowing how to read faults while in front of the equipment may also be helpful. The seven segment LED(s) can provide you with information as long as you have the key. The display will also let you know operational codes. Here are a list of codes you may see at the seven segment LED inside the furnace…
Click on the one you have to find out more as you will be directed to the appropriate EcoNet Fault Page.
The Alarm or Alert I have at the furnace is...
d1: No Model Data
d4: No Valid Model Data
d6: Horsepower Conflict
10: One-Hour Lockout
11: Failed Ignition
12: Low Flame Sense
13: Flame Lost After Established
14: Flame Present with Gas Valve Off
22: Main Limit Open
23: Auxillary Limit Switch Open
26: Reversed Polarity
30: Open Fuse
33: Over-temp Switch (Rollout) Open
34: IDM Overcurrent
42: Flame LED Not Detected
43: Ignition Pressure Switch Closed When Should Be Open
55: Combustion Pressure Switch Closed When Should Be Open
56: Ignition Pressure Switch Open When Should Be Closed
57: Combustion Pressure Switch Open When Should Be Closed
58: Water Circuit Open
59: Water Sensed
60: Blower Fault - Blower Can Still Run
61: Blower Fault - Motor Cannot Run
66: Blower Cutback
68: No Blower Communications
71: Inducer Fault
74: Gas Inlet Pressure Switch Fault
75: Venturi Air Inlet Pressure Switch Open
77: No Gas Valve Feedback Signal
81: Return Air Sensor Fault
82: Supply Air Sensor Fault
84: Outdoor Air Sensor Fault
93: Internal Control Fault Detected
