Table K3: LED Code Troubleshooting
LED
Code
System
Description
Actions
Flashes
Lockout
Failure to light or carryover. Loss of flame or flame
signal during ignition or operating cycle. Control
will initiate up to three ignition re-trials before
lockout.
Verify gas supply available and operation of gas valve –
manifold pressure at start of ignition cycle. Check for power to
valve terminals Low and Com while spark is energized.
Is spark present? If no, check igniter for debris between
electrodes, cracked ceramic and check ignition wire for short
to ground.
Check flame sensor wiring connections to electrode and
control and for any abrasions.
Check for cracked ceramic on flame sensor or grounded
sensor rod.
Verify that ample air supply and proper venting of flue gases
occurs during operating cycle.
Check for circulating air leaks into burner compartment during
operation.
Check for re-circulation of flue gases into combustion air
supply.
If all conditions satisfactory, replace ignition control.
VCES-VHC-IOM-1F – VHC-36, -42 & -50
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