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Servicing should only be performed by a Qualifi ed Service Agent
TROUBLESHOOTING
TEST 3: CONTINUITY CHECK OF HIGH LIMIT (ECO)
Conditions:
Power On – No Hot Water•
Red, heater control “Call for Heat” LED – on•
Red ignition control board diagnostic LED – 4 Flashes•
Note LED Flash Code before resetting water heater control.•
See • Ignition Control Board: Error Codes.
Turn Power OFF.•
Figure 22
TEST 3
Continuity check of ECO
(energy cut-off, 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.