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View Full Version : Rheem classic 90 plus troubleshooting codes

Hereandnow
Jan 7, 2014, 06:47 PM
Rheem classic 90 plus flashes code '57'. Your thoughts?
ma0641
Jan 7, 2014, 07:08 PM
Google "Rheem code 57". Gives you insight and how to test. It is in the pressure sensor circuit.