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FAULT AND ALERT MESSAGES
Call the technical support phone number listed on the back cover for further technical assistance or to locate a qualified service agent
in your area.
POSSIBLE CAUSES - CHECK/REPAIR
DISPLAYED FAULT/ALERT MESSAGE
• Using a manometer, ensure that gas supply pressure is above
minimum requirement listed on heater’s data plate and does not
drop more than 1.5” W.C. when unit fires.
• Ensure wire connections to gas valve are clean and tight.
• Ensure wire connections to flame sensor are clean and tight.
• Ensure wire connections to spark igniter are clean and tight.
• Inspect flame sensor, clean/replace as needed.
• Inspect spark igniter, realign igniter gap as needed
• Ensure adequate electrical ground to heater.
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ADVANCED
Ignition Failure
Fault occurred 2 mins ago
Flame not detected. Clean flame rod.
Check gas supply.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• Confirm supply gas is turned on.
• Using a manometer, ensure the supply gas pressure is above
minimum pressure requirement listed on heater’s data plate
before and during operation.
• Ensure wire connections to gas pressure switch are clean and
tight.
• If all above conditions are met, replace gas pressure switch.
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Low Gas Pressure
Fault occurred 2 mins ago
Gas pressure is below minimum
required to operate this unit. Check
gas pressure and switch.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
• If Blocked Exhaust error occurs when blower is running, check for
restrictions in exhaust pipe, including exhaust elbow, condensate
drain, and outside termination. Also check exhaust pipe installation
(size/length) per manual.
• If Blocked Exhaust error occurs before blower runs, make sure
pressure switch connections are clean and tight. Check pressure
switch continuity/resistance. Switch should be closed (continuity/0
ohms). Replace switch if open (no continuity).
• Other possible causes: high wind conditions and excessive
negative air pressure in building.
CHANGE
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ADVANCED
Blocked Exhaust
Fault occurred 2 mins ago
Restriction in exhaust pipe. Check
exhaust pipe and termination for
blockage.
Call a service professional:
Your Company Name Here
(press [DOWN] for more....)
