FieldBench
Rheem codes

Rheem

22

Protect

Limit open

Overtemp / airflow.

Walk 22 in Diagnose

10 plates — walk the one on the cabinet

First check

1 Airflow before you touch the limit

On Rheem R801S a limit is airflow or overfire until proven otherwise. Do not replace the limit first. Filter, blower wheel, A-coil, and the heat-speed setting for THIS motor (tap, model plug, or communicating CFM — not a sister SKU chart). Filter, VS heat CFM, coil on top of the 80%, rise.

Expect: Rise in the rating-plate window. Static vs this cabinet’s blower chart.

The rest of the walkthrough is Diagnose.

On the plates

  • Filter, coil, heat tap on this CT motor (61 if the motor is the cause).
  • Rise vs plate. Overfire.
  • VS heat CFM, filter, coil, rise.
  • 61 if the VS motor is the cause — this is not a TA tap motor.
  • Filter, VS heat CFM, coil on top of the 80%, rise.
  • EcoNet heat CFM, filter, coil, rise.
  • A 24V fallback (if someone forced one) will not modulate airflow correctly and will trip 22.

Plates that use 22

Same number, other makers

22 on Rheem is not the same code on these plates.