Diagnostic Error Codes And Troubleshooting Procedures For Honeywell Integrated - andrews 10/105 Installation And Service Manual

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Diagnostic error codes and troubleshooting procedures for Honeywell integrated

control
Error code Definition of code
4 Low flame sense
2 Pressure switch failed
to open
(stuck closed)
29 Pressure switch failed
to close
(stuck open)
6 Flame sensed out of
normal sequence
(before opening gas
valve or after closing
gas valve)
23 Flame detected
before ignition
24 Flame detected after
heating cycle
completes
31 Upper sensor
reading faulty
Cause of problem and actions taken to correct
Determine flame sense current in the Service mode with the water
heater operating. If less than 1.0 microamps, check pilot flame
sense rod with emery cloth. If problem is not solved, replace pilot.
Check to make sure gas valve has closed. No voltage should be
present at the gas valve before or after ignition cycle. Make sure
wire positions on the wire harness are correct. If gas valve is stuck
open, replace.
Check to make sure gas valve has closed. No voltage should be
present at the gas valve before the ignition cycle. Make sure wire
positions on the wire harness are correct. If gas valve is stuck
open, replace.
Check to make sure gas valve has closed. No voltage should be
present at the gas valve before the ignition cycle. Make sure wire
positions on the wire harness are correct. If gas valve is stuck
open, replace.
Resistance of upper sensor out of operating range. Check
continuity of wire harness to upper sensor, and if O.K., replace
upper sensor.
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