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Ignition Control 103130-XX Diagnostic Codes Continued
Code
Diagnostic Codes/Status of Equipment
Action Required to Clear and Recover
E206
Gas valve second-stage relay failure
Furnace will operate on 1st stage for remainder of the
heating demand. Will clear after fault recovered. If un-
able to operate 2nd stage, replace control.
E207
Hot surface ignitor sensed open.
Measure resistance of hot surface ignitor. Replace if
open or not within specified range found in IOM. Re-
sumes normal operation after fault is cleared.
E223
Low pressure switch failed open.
Check pressure (inches w.c.) of low pressure switch
closing on heat call. Measure operating pressure (inch-
es w.c.). Inspect vent and combustion air inducer for
correct operation and restriction. Resumes normal op-
eration after fault is cleared
E224
Low pressure switch failed closed.
Check operation of low pressure switch to see if it is
stuck closed on heat call longer than 150 seconds. Mea-
sure operating pressure (inches w.c.). Inspect vent and
combustion air inducer for correct operation and restric-
tion. Resumes normal operation after fault is cleared.
E225
High pressure switch failed open.
Check pressure (inches w.c.) of high pressure switch
closing on heat call. Measure operating pressure (inch-
es w.c.). Inspect vent and combustion air inducer for
correct operation and restriction. Resumes normal op-
eration after fault is cleared.
E226
High pressure switch failed closed
Check operation of high pressure switch closing on heat
call. Measure operating pressure (inches w.c.). Inspect
vent and combustion air inducer for correct operation
and restriction. Resumes normal operation after fault is
cleared.
E227
Low pressure switch open during trial for ignition
or run mode.
Check pressure (inches w.c.) of low pressure switch
closing on heat call. Measure operating pressure (inch-
es w.c.). Inspect vent and combustion air inducer for
correct operation and restriction. Resumes normal op-
eration after fault is cleared.
E228
Combustion air inducer calibration failure
Unable to perform pressure switch calibration. Check
vent system and pressure switch wiring connections.
Resumes normal operation after fault is cleared.
E229
Ignition on high fire
IFC switched to high fire ignition because low fire pres-
sure switch did not close in allowed time. No action is
needed.
E240
Low flame current - Run mode.
Check micro-amperes of flame sensor using control
diagnostics or field-installed mode. Clean or replace
sensor. Measure voltage of neutral to ground to ensure
good unit ground. Alert clears after current heat call has
been completed.
E241
Flame sensed out of sequence - Flame still pres-
ent.
Shut off gas. Check for gas valve leak. Replace, if nec-
essary. Alert clears when fault is recovered.
E250
Limit switch circuit open.
Check for proper firing rate on furnace. Ensure there is
no blockage in heater. Check for proper air flow. If limit
not closed within 3 minutes, unit will go into 1-hour soft
lockout. Resumes normal operation after fault is cleared.
E252
Discharge air temperature too high (gas heat only). Check temperature rise, air flow and input rate. Cleared
when heat call is finished.
E270
Soft lockout - Exceeded maximum number of re-
tries. No flame current sensed.
Check for proper gas flow. Ensure that ignitor is lighting
burner. Check flame sensor current. Clears when heat
call finishes successfully.
