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TABLE 5 Continued
Ignition Control 103130-XX Diagnostic Codes
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 specied 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 re IFC switched to high re ignition because low re pres-
sure switch did not close in allowed time. No action is
needed.
E240 Low ame current - Run mode. Check micro-amperes of ame sensor using control
diagnostics or eld-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 o gas. Check for gas valve leak. Replace, if nec-
essary. Alert clears when fault is recovered.
E250 Limit switch circuit open. Check for proper ring rate on furnace. Ensure there is
no blockage in heater. Check for proper air ow. 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 ow and input rate. Cleared
when heat call is nished.
E270 Soft lockout - Exceeded maximum number of re-
tries. No ame current sensed.
Check for proper gas ow. Ensure that ignitor is lighting
burner. Check ame sensor current. Clears when heat
call nishes successfully.
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