Rheem RTG2-42 Troubleshooting Manual page 48

Does the
P.G.F.R. valve
have a voltage?
Yes
Is the resistance
of the Gas Inlet
Solenoid Valve
OK?
Yes
Is the resistance
of the Solenoid
Valve #1 OK?
Yes
Is the resistance
of the Solenoid
Valve #2 OK?
Yes
Is the resistance
of the Solenoid
Valve #3 OK?
Yes
No
Measure the voltage of connector R
between Black#2 and Red#1 wires:
1.5 to 14 VDC
No
Measure the resistance of connector K
between Black and Yellow wires:
0.8 to 2.4k Ohms
No
Measure the resistance of connector K
between Black and White wires:
0.8 to 2.4k Ohms
No
Measure the resistance of connector K
between Black and Red wires:
0.8 to 2.4k Ohms
The 2-4.2 and 5.3 units only have two stages of burner. Skip the
next step.
No
Measure the resistance of connector K
between Black and Blue wires:
0.8 to 2.4k Ohms
47
SVC 810 Tankless Troubleshooting Manual
Replace Printed Circuit Board
Replace Gas Control Assy
Replace Gas Control Assy
Replace Gas Control Assy
Replace Gas Control Assy