Manual

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Did you
Allow Sufficient Time
for the Thermocouple
to Warm Up?
Is
the Gas Hose
Partially
Plugged?
Allow 30 - 60
Seconds Warm-Up
Before Releasing
Pilot Button.
Remove the Component and Clean It.
Yes
No
Yes
Yes
Yes
Is
Thermocouple
Weak or
Defective?
A. Check Thermofuse in Thermocouple for
Continuity. If Thermofuse is “Open”, Replace Thermocouple.
B. If Thermofuse is Good, Check Millivolt
Output of Thermocouple with Millivolt Test Kit. Output Should be at Least 4 mv D.C. A Reading of Less Than 4 mv
D.C. Can Cause Inner Cone to Go Out. If Thermocouple is Weak, Replace it.
Is Safety
Control Valve
Defective?
Is Primary Orifice
Plugged?
Remove Orifice and Clean It.
Check Gas Pressure to the
Heater Inlet with a Gas Gauge.
Proper Pressure at High Heat
Should Read 5 PSIG. Low Heat
is 10 in. W.C.
No
No
No
Is Thermo-
couple Contact Nut
Tightened Securely into
Gas Control
Valve?
Snug Contact Nut in
Place. (Do Not
Overtighten.) Check for
Debris Between Contact
of Thermocouple and
Electromagnet of Valve.
Yes
No
Is
Thermocouple Tip
Positioned Properly
into Flame?
Position Edge of
Thermocouple to be
1/2 - 9/16 in. above
Heater’s Housing.
Yes
No
Is Button
on Safety Control
Valve Fully
Depressed?
Depress the Button on the
Pilot Safety Valve until Gas
Flows Through.
Yes
No
Check Drop-Out of Electromagnet in Safety Control Valve with the Millivolt Test Kit. The
Valve Magnet Should Drop Out at 2.0 mv D.C.
If the Magnet Drops Out above 2.0 mv D.C., Replace the Safety Control Valve.
Yes
Is Proper Gas
Pressure Supplied to
the Heater?
No