19
Blower runs,
burner ignites
but will not
heat.
Improper burner air adjustment
setting.
Adjust the setting.
Scale build up in heat exchanger
coil.
Consult Customer Service.
Burner
discharges
white smoke.
Low on fuel.
Refuel. If white smoke persists, consult Customer
Service.
Excessive air supply.
Adjust air flow.
Burner
discharges
black smoke.
Insufficient air supply.
Adjust to ensure air flow is sufficient.
TROUBLESHOOTING
Blower runs,
burner ignites
but will not
heat.
Thermostat knob is OFF.
Check thermostat knob position.
Detergent valve is open, but
detergent hose is not completely
submerged in solution. (This
causes safety devices to shut
down burner.)
Close valve, or completely submerge vinyl hose
into detergent solution.
Poor or improper fuel supply.
Check fuel to ensure it is correct. Drain tank and
replace filter if necessary and refill with proper fuel.
Dirty or clogged fuel filter or fuel
water separator.
Drain or replace as necessary.
Low fuel pump pressure.
Check fuel pump pressure, adjust or replace if
needed.
Dirty or clogged fuel nozzle.
Replace fuel nozzle.
