Rheem 64DV Troubleshooting Manual page 82

S V C 8 2 0 ( P ) P o c k e t M a n u a l P a g e
Explanation: Flame rod(s) malfunction. Flame rod(s)
is detecting the presence of flame BEFORE igniter is
activated.
Diagnostic Checks:

Flame rod(s)

Gas control valve
Remove and reinsert connector M , T ,
Indoor models – 2 flame rods (Connectors M & T ).
Outdoor models – 1 flame rod (Connector M ).
Access maintenance mode to
check flame rod status.
Locate sight glass.
Continue to diagnostic chart
on next page.
(See maintenance mode instructions on page 21)
72 – Error Code
Turn Power OFF.
and terminal on flame rod(s).
Turn Power ON and operate unit.
Did 72 – Error Code appear?
Unit had a loose connection
or foreign debris that is no
longer present.
Unit appears to be operating
OK.
SIGHT GLASS
81
Connector Location
On Page 14
81