Rheem
13
ProtectFlame lost
Dropped after prove.
Walk 13 in Diagnose
8 plates — walk the one on the cabinet
First check
1 Measure µA while it is running
Do not clean first and guess. Series-µA the rod on Rheem R801S during a call. Falling µA is oxide, ground, or a dying flame. A hard drop is often the pressure switch or limit opening, not the rod. Draft after blower-on, rod, gas.
Expect: Typically ≥ 1.0 µA DC on this family — confirm the door card. Rising while running.
The rest of the walkthrough is Diagnose.
On the plates
- Venting that starves the flame after light-off and blower-on.
- Manifold sag under load.
- Rod position and ground.
- Vent after blower-on, manifold, rod.
- Draft after blower-on, rod, gas.
- Chimney draft after blower-on, rod, gas.
Plates that use 13
Same number, other makers
13 on Rheem is not the same code on these plates.