Rheem GHE80ES/THE80ES GHE100ES/THE100ES Error 20: Flame detected just before gas valve opened

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

Error code20

Flame detected just before gas valve opened The manual's first action is: “A20 Flame snse wo ht Immediate Lock Out! Call Tech Service PRESS HELP”

Model
Rheem GHE80ES/THE80ES GHE100ES/THE100ES
Display shows
Flame detected just before gas valve opened (20)
Type
Error code
Source
Manual p. 32

What 20 means

Flame detected just before gas valve opened p. 32

Common causes

  • Flame detected just before gas valve opened p. 32

What to do

  1. A20 Flame snse wo ht Immediate Lock Out! Call Tech Service PRESS HELP p. 32

If 20 is still not resolved

  • A20 Flame snse wo ht Immediate Lock Out! Call Tech Service PRESS HELP p. 32
    “A20 Flame snse wo ht Immediate Lock Out! Call Tech Service PRESS HELP”
Open the manual at page 32 All GHE80ES/THE80ES GHE100ES/THE100ES error codes Manual details & download

This page summarises what the manufacturer’s manual says about 20; 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.