Rheem 305, 505, 705 Error 52: Modulating Solenoid Valve Signal Abnormal

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

Fault code52

Modulating Solenoid Valve Signal Abnormal means there is damage or looseness in the valve's wiring harness. The manual's first action is: “Measure resistance of valve coil.”

Model
Rheem 305, 505, 705
Display shows
Modulating Solenoid Valve Signal Abnormal (52)
Type
Fault code
Source
Manual p. 10

What 52 means

Modulating Solenoid Valve Signal Abnormal p. 10

Common causes

  • Check modulating gas solenoid valve wiring harness for loose or damaged terminals. p. 10

What to do

  1. Measure resistance of valve coil. p. 10

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

If 52 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 52; 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.