Rheem IKONIC RTGH-SR11i - Page 42

IKONIC Tankless Water Heater Service Manual
42
2.2 ERROR CODE LIST
A036 ERROR CODE
Exhaust Thermistor Malfunction.
Diagnostic Check
Exhaust Thermistor.
ERROR CODE DIAGNOSTICS
Turn Power OFF
Remove connector "H".
Measure resistance between #4 wire (Red)
& #11 wire (Yellow)
Reinsert connector "H".
Operate unit. If Error Code A036 appears:
Replace control board.
Clean scale build-up on exhaust thermistor.
Operate unit. If Error Code A036 appears:
Replace exhaust thermistor.
Replace wiring harness for connector "H".
Remove control board bracket to access
inlet thermistor Molex near blower motor.
(How to Remove: Section 1).
Locate & separate WHITE Molex (located
near blower motor). Check resistance across
White wires on female end of Molex.
Reconnect Molex.
Check resistance on connector "H" between
#1 wire (Blue) & #11 wire (Yellow)
Reinsert connector "H".
Operate the unit.
If error code "A036" appears:
REPLACE CONTROL BOARD.
The resistance is
7K - 23K Ohms?
The resistance is
7K - 23K Ohms?
The resistance is
7K - 23K Ohms?
No
No
No
Yes
Yes
Yes