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Thermal Well Testing
Follow the procedure, below, if the water heater gas control has gone into a ECO lock-
out (4 flash, 3 second pause). Reset the gas control by rotating the setpoint knob to
the minimum setting for at least 6 seconds before returning to the desired water tem-
perature setting.
Step 1. Unplug the thermal well connector from the gas
control.
Step 2. With a multi-meter set to the ohms setting, meas-
ure the resistance between the middle and right side wires.
Step 3. With a multi-meter set to the ohms setting, meas-
ure the resistance between the middle and left side wires.
Thermal Well Testing
CAUTION
Do not use standard multi-meter probes for this testing. Doing so will damage the connector. Use special pin type
e
lectronic probes or small diameter wire pins inserted into connector.
Thermal well connector
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