User Guide

See SERVICE PROCEDURE RG-II

THERMOCOUPLE TESTING

MAGNET ASSEMBLY TESTING (White Rodgers Control)

Step 1. Following the lighting instruction label on the heater, proceed to light the pilot and allow to operate for

three minutes. If the pilot will not stay lit, hold the pilot button (located on the gas valve) down during

this test.

Step 2. Using a multimeter capable of measuring millivolts, connect one lead using an alligator clip to the

copper sheath of the thermocouple, use the second lead of the multimeter to probe the top terminal

located at the back of the gas valve.

Probe top terminal on

back of combination

thermostat/gas valve

Alligator clip to copper

sheath of thermocouple

Step 6. With a meter reading of 13 millivolts or greater, rotate knob of combination thermostat/gas valve to

the “OFF” position.

Step 7. The magnet should remain closed for a drop of at least 6 millivolts. You will here a “snap” or “click”

sound when the magnet opens, if you hear this sound prior to a drop of 6 millivolts, the magnet is

out of specification and the gas valve should be replaced.

SERVICE PROCEDURE RG-V

Gas Valve Testing and Replacement

(White Rodgers)

Step 1. Disconnect thermocouple from gas valve.

Step 2. Using a multimeter capable of measuring Ohms (or continuity),

attach one lead (alligator clip) to the pilot tube. Insert the other

lead (probe) fully into the magnet opening, Be sure the probe

makes contact only at the top center of the magnet opening.

Do not allow the probe to make contact with the threaded

sides of the opening.

Step 3. If continuity is indicated, the ECO is OK. If continuity is not indicated, the ECO has opened and the

gas valve must be replaced.

ECO (Energy Cut Off) TESTING