Condensing PDV Series
25
Service Procedure VI
Gas Control Testing and
Replacement
ECO (Energy Cut Out)
The Honeywell gas control is designed with an ECO device that will reset.
Observe the Green LED indication.
Does the error code 4 (four flash with a
three second pause) continue?
Resume normal operation.
If the control has gone into lockout due to excessive tank temperature (four flash, three
second pause), reset the control by turning the gas control to the “LOW” position and wait
a minimum of (6) seconds. Then rotate the gas control knob to the desired setpoint (at
least a 45° rotation) and follow the lighting instructions to return to nomal operation.
Confirm that the water temperature inside the tank has cooled.
Draw approximately 4 gallons of water from the drain valve into a
container and discard. Draw an additional gallon and immediately
measure the temperature using an accurate thermometer.
If it is confirmed that the water temperature
has cooled down below the setpoint level
and you are still observing an error code 4
as above, replace the gas control.
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