Sunfire SF-150 Service Manual page 6

Symptom
9. No green light calling for heat
when unit is turned on
10. Bad flame
11. Smoky flame
12. No flame
Other issues
Possible Cause
Check the reset button
If using thermostat
Defective Primary
Clogged Nozzle
Dirty/poor fuel
Clogged/dirty filter
Open transformer lid
Diesel treatment was used
Air flow is restricted
Improper seal between fuel fliter
and filter assembly.
Bad fuel
No fuel
fuel is not spraying
Vaccum leak
We are here to assist you.
Corrective Action
Push and hold the reset button
See #8 above
Replace primary
Soak Nozzle in parts
cleaner/degreaser and blow it
out. Or replace nozzle.
drain fuel and add new clean
fuel.
Replace filter
Make sure lid is closed
Add clean fuel to decrease
treatment ratio, or drain all fuel
and replace with new fuel and
clean diesel treatment.
Check air band and increase the
air flow until smoke is no longer
visible.
Check the seal on the fuel filter
to make sure there are no
obstructions between the filter
and the filter assembly that
could allow air to become mixed
in the fuel, causing an improper
fuel mixture.
Drain fuel from tank and add
new clean fuel.
Add fuel
There are multiple possibilities.
Call your distributor or the
manufcturer at (855) 251-1649
for instructions.
Check hoses for leaks and
tighten or replace.
Call us at (855) 251-1649
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