Owner's manual

PIEZO IGNITER, ELECTRODE TESTING AND REPLACEMENT

With the pilot not in operation (no pilot flame) you can check the Piezo and electrode circuit by viewing pilot

thru the sight glass located on the inner door and observing the spark action.

Step 1. Remove outer jacket door.

Step 2. Repeatedly depress the Piezo igniter while viewing the pilot thru the sight glass. If a spark is

present, the circuit is OK. If there is no spark, proceed to step 3.

Step 3 Remove orange wire from Piezo igniter and install a jumper wire in its place. Hold the other end of

the jumper by the wire insulation or using an insulated tool, next to an unpainted surface such as

the feedline or gas valve and depress the Piezo igniter. If there is a spark, the igniter is OK, the pilot

is not functioning and must be replaced, see SERVICE PROCEDURE RG-III for pilot

replacement. If no spark is present the igniter is not functioning and must be replaced.

Step 4 With orange wire disconnected from piezo igniter. Using a common screw driver, place blade of

screw driver under piezo bracket and gently pry bracket from front of combination thermostat/

gas valve and unhook bracket from rear of combination thermostat/gas valve.

View spark

Action through

Sight glass

Repeatedly

Depress Piezo

Igniter

Common Screw

Driver

SERVICE PROCEDURE RG-IV

Piezo Igniter, Electrode Testing and Replacement