DV Series
29
NOTE: Using a multi-meter set to the
ohms setting, insert one-meter probe
into center wire position of thermal
well connector, insert the second
probe into either of the outside wire
positions (see photo).
Alternate the probe on the outside
position to the opposite outside wire
position (see photo).
Temperature Sensor Testing (Honeywell)
Step 1. If control has gone into lockout due to excessive
tank temperature (four flashes, three second
pause), reset control by rotating gas control knob
to “OFF” position and wait a minimum of five (5)
minutes. Then follow lighting instructions and
return the gas control knob to a desired setpoint.
Step 2. Observe green light indicator. Does status code 4
(four flashes, three second pause) appear?
a. If no, resume normal operation.
b. If yes, continue with Step 3.
Step
3. Following “Honeywell Cover Removal,”
“Honeywell Valve Body Removal and
Temperature Sensor Removal
”
instructions,
disassemble gas control to access the
temperature sensor.
Step 4. With the temperature sensor still in the back
plate, use a multimeter set to the ohms setting,
determine the resistance of the temperature
sensor (see photo).
Step 5. See next page to obtain water temperature. Are temperature sensor values correct?
a. If no, replace the temperature sensor.
b. If yes, replace the gas control.
CAUTION
DO NOT use standard
multimeter probes for this test.
Doing so will damage
connector. Use special pin
type electronic probes or
small diameter wire pins
inserted into connector.
Service Procedure IV
Gas Control Testing and
Replacement (Honeywell ONLY)
29
