Rheem GHE80ES/THE80ES GHE100ES/THE100ES Error 23: Blocked flue switch during Post purge

Gas water heater · taken from the manufacturer’s manual, pages cited

Error code23

Blocked flue switch during Post purge The manual's first action is: “A23 Pressure Switch Check wiring To pressure switch”

Model
Rheem GHE80ES/THE80ES GHE100ES/THE100ES
Display shows
Blocked flue switch during Post purge (23)
Type
Error code
Source
Manual p. 32

What 23 means

Blocked flue switch during Post purge p. 32

Common causes

  • Blocked flue switch during Post purge p. 32

What to do

  1. A23 Pressure Switch Check wiring To pressure switch p. 32

If 23 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Rheem service.

This page summarises what the manufacturer’s manual says about 23; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Rheem. Found a mistake? Report an error.