York SUNLINE PLUS D2EG 048 - Manual (Page 19)

6. The pilot burner ignites but the sparker continues to spark
and the main burners do not ignite.
a. Make the same checks and adjustments as described
in Item 5.
b.Make sure that the pilot burner is not bent or damaged.
c. Make sure that the ground connections at the pilot
burner, gas valve and ignitor control are intact. Check
the high tension wire for good electrical connection. If
all are intact, replace the ignitor module.
7. The pilot burner lights and the spark stops but the main
burners do not light.
a. Check electrical connections between the ignitor con-
trol and the gas valve. If intact, check for 24 volts across
terminals “MV” and “COMMON” terminals. If no voltage
is detected, replace the ignitor control. If voltage is pres-
ent, replace the gas valve.
8. Furnace lights with roll out or one burner has delayed igni-
tion.
a. Make sure that the pilot burner is aligned properly with
the carryover as described in “PILOT CHECKOUT”.
b. Make sure that the carryovers on adjoining burners are
screwed fast and are level with respect to one another.
9. Main burners light but exhibit erratic flame characteristics.
a. Adjust air shutters as described in “BURNER AIR
SHUTTER ADJUSTMENT”.
b. Check the main burner orifices for obstruction and
alignment. Removal procedure is described in
“BURNER INSTRUCTIONS”. Clean or replace burner
orifices and burners as needed.
Unitary Products Group 19
035-14832-003-A-0204
TROUBLESHOOTING - Continued.