4BN/L6-24,4SN/L5 -24 Manual
IM100310
RD: MAR, 2010
RL: 1A - BA
27
PROBLEM
PROBABLE CAUSE
SOLUTION
Burner will not light
No Ignition
Gas supply valve may be in
OFF position
No power to heater
Air in gas supply system.
Orifice blocked
Igniter cracked, bent/or not in
the correct position to ignite.
Turn the gas valve ON
Turn on Power to 24Vac transformer
Check for 24Vac at transformer .
Check for 24Vac at heater connection.
Check 24Vac to ignition control
Check for loose wire or bad connection.
Purge air from lines.
Check for spider or obstruction in Orifice.
Clean or replace orifice.
Visibly check Igniter for good spark.
Check if spark Igniter is shorting out from
the porcelain to ground.
Check Igniter gap setting is approx 3/16” .
Burner will not stay lit
Sensor cracked, bent/or out of
position.
Spark does not stop when
Burner lights .
Check burner flame is ‘covering’ Sensor.
Repair or replace Sensor.
Control is not sensing the flame
Check grounding and all connections.
Replace ignition control
Low Burner flame
Gas pressure is low
Spider web or insect cocoon
Check gas pressures with manometer.
Check for restricted or plugged orifice.
18. TROUBLE SHOOTING
WARNING:
Improper installation, adjustment, alteration, service or maintenance
can cause property damage, injury or death.
This heater must be installed and serviced only by a qualified gas service technician.
PROCEDURES IN THIS SECTION IS FOR QUALIFIED GAS
SERVICE PERSON ONLY
