Filter
Top Products
54
Step 6:
Continue pressing the “Temperature Down” button to change to the next error code index and press “Select” to view the
error code number, if any, for that index number. Continue on to index #1, the oldest error code index. The water heater
display will store up to 10 error codes with the oldest code starting in code index #1 with the most recent code in code
index #10.
Step 7:
10 seconds after the last button press, the Water Heater Display will revert back to the current error code display. To exit
Service Mode, either wait 30 seconds or press Temperature Up button and Select Button for 3 seconds.
DIAGNOSTIC ERROR CODES AND TROUBLESHOOTING PROCEDURES FOR HONEYWELL INTEGRATED
CONTROLS
(PDV AND INDUCED DRAFT MODEL SERIES)
Error
Code
Definition of Code Cause of Problem and Actions Taken to Correct
4
Low Flame Sense
Current
Determine flame sense current in the Service Mode with the water heater
operating. If less than 1.0 microamps, check pilot flame sense rod and wire.
Clean flame sense rod with emery cloth. If problem is not solved, replace pilot.
2
Pressure Switch
Failed to Open (Stuck
Closed)
The pressure switch contacts did not return back to the normally open position at
the end of the last heating cycle. The control checks to make sure the pressure
switch is in the normally open position before allowing the blower to start the
ignition sequence. Check to make sure the pressure switch tubing is not blocked.
If the pressure switch tubing is clear, replace the pressure switch.
29
Pressure Switch
Failed to Close
The pressure switch contacts did not close after the blower was energized. Check
to make sure the blower is energized at the beginning of the heating cycle. If the
blower did not start, check to make sure there is power to the motor. Replace
blower or control board if defective. Check to make sure the venting system is not
blocked. Make sure the vent length does not exceed the specified limits. Make
sure the vent terminal is not blocked. Check to make sure the pressure switch
tubing is clear. Replace the pressure switch if the venting system has checked out
O.K. Control will reset once problem is corrected.
6
Flame Sensed Out of
Normal Sequence
(Before Opening Gas
Valve or After Closing
Gas Valve)
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.
SELECT SET
Status
°F
idle
setpoint
Operational
Exiting Service Mode