Rheem 305, 505, 705 Error 32: Outgoing Water Temperature Sensor Fault

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

Fault code32

Outgoing Water Temperature Sensor Fault means the sensor wiring may be damaged or scale build-up has occurred on the sensor. The manual's first action is: “Measure resistance of sensor.”

Model
Rheem 305, 505, 705
Display shows
Outgoing Water Temperature Sensor Fault (32)
Type
Fault code
Source
Manual p. 10

What 32 means

Outgoing Water Temperature Sensor Fault p. 10

Common causes

  • Check sensor wiring for damage. p. 10
  • Clean sensor of scale build-up. p. 10

What to do

  1. Measure resistance of sensor. p. 10
  2. Replace sensor. p. 10

Before you service the product, read the safety instructions in the manual p. 4.

If 32 is still not resolved

  • Immediately call your gas supplier from a neighbor’s phone. p. 1
    “Immediately call your gas supp lier from a neighbor’s phone.”
  • If you cannot reach your gas supplier, call the fire department. p. 1
    “If you cannot reach your gas supplier, call the fire department.”
Open the manual at page 10 All 305, 505, 705 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 32; 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.