40
LP-505 REV. 4.29.14
Exhaust NTC detects Vent
Temperature is Greater
than 149
o
F (65
o
C)
This Error Code will go away when the condition is remedied.
If Error happens again:
1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for normal operation.
2. Check exhaust temperature sensor. Ensure connections are secure.
3. Check sensor resistance. If resistance is zero, replace the sensor.
4. Check exhaust vent for blockage.
5. If the problem persists, replace the control.
6. If the problem persists, replace the heat exchanger.
Table 22 –Diagnostics and Suggested Corrective Actions
This water heater is equipped with a blocked vent shutoff system. If Error Codes Er:29, Er:41, or Er:94 occur, turn off the gas valve at
the manual shutoff. Check the vent terminations for obstructions. If no obstructions are found, reset the water heater by pressing the
power button. If the error continues to occur, call a qualified service technician or the gas supplier to check the water heater. Failure to
follow these instructions could result in property damage, personal injury, or death.
G. ERROR TREE ANALYSIS
1. FLAME DETECTION
Figure 31 – Flame Detection Error Analysis Tree
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