Manual

22
Problem 2
Pilot Lights, but will not Stay Lit
Did you
Allow Sufficient Time
for the Thermocouple
to Warm Up?
Is
the Gas Hose or
Pilot Line Partially
Plugged?
Allow 30 - 60
Seconds Warm-Up
Before Releasing
Pilot Button.
Remove the Components and Clean with Compressed Air.
Yes
No
Yes
Yes
Yes
Is
Thermocouple
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 Pilot Flame or Inner Cone Drop-Out. If Thermocouple is Weak, Replace it.
Is Pilot Safety
Control Valve
Defective?
Are Pilot
Screen or Pilot
Orifice Plugged?
Check Gas Pressure to the
Heater Inlet with a Gas
Gauge. Proper Pressure at
High Fire - 5 PSIG.
Pilot Pressure - 20 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
Brooder Housing.
Yes
No
Check Drop-Out of Electromagnet in Pilot 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 Pilot Valve.
Yes
Is Proper Gas
Pressure Supplied to
the Heater?
No
Use InstaClear™ Clean-Out or Clean Pilot Orifice and Pilot Screen with Air.