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TM061 Rheem 27 Water Star Service Instructions – Issued: 11/10
REV A Issued 08/13
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Error Code 12
Flame Failure. Unit operated for a period of time; but has since lost flame or the ability to
verify the presence of flame. At a minimum check the following in all cases:
1 Bleed all air from gas lines.
2 Ensure appliance is properly earthed.
3 Ensure gas line, meter, and regulator are sized properly.
4 Ensure gas type and gas pressure is correct.
Error Code 12
Is the inlet gas pressure
correct?
Advise customer to contact
installer to rectify.
NO
Are the min and max burner
gas pressures correct?
YES
NO
Refer to „Burner Gas Pressure Check‟
Attempt to operate the water
heater by opening a hot tap.
Adjust the burner gas pressure.
Refer to section on burner gas
pressure adjustment.
Check flame sensor positioning
and wiring for breaks. Adjust or
replace flame sensor or lead.
YES
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