Technical information

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Servicing should only be performed by a Qualied Service Technician
TEST 3 – CONTINUITY CHECK OF HIGH LIMIT (ECO)
TEST 3
Continuity check of ECO (energy cut-out, high limit).
Black to Black wires of upper probe. Power is off.
IF......... THEN............
Continuity is indicated
(ZERO “0.0” Resistance)
Opens at 203° F; closes at 193° F. If water is below 193° F,
continuity is correct.
Continuity is not present
(meter reads “0.L”)
Replace ECO sensor, if water temperature is below 193° F.
Water is less than 120° F Reset status LED should be on.
Replace heater control if control will not manually reset.
CONDITIONS:
• Power On – No Hot Water.
• Red, heater control “Call for Heat” LED – On.
• Red ignition control board diagnostic LED – 4 Flashing.
• Note LED Flash Code before resetting water heater control.
• See Description of diagnostic LED Flashes.
• Turn Power Off.