Owner's manual

Two Times Indicates lack of air proving in fan section (Flash pattern begins within 90 seconds after condition Occurs).
Do air proving switch
contacts close?
Check continuity.
Remove dirt. repair or replace fan.
Is fan binding, or
bent, or caked
with dirt?
No
Is Fan loose On
motor shaft?
Tighten fan blade set screw
Is proper voltage
supplied to motor
from ignition
control?
Defective motor
Does ignition
control send voltage
to air proving
switch?
Is
ignition control
receiving proper
voltage?
No
Is
proper voltage
supplied to heater
power cord?
Defective ignition control.
Defective air proving
switch.
20
Is switch binding?
Repair.
Problem
Does fan motor
run?
No
Yes
Check circuit breakers,
and any extension
cords if used.Contact a
qualified electrician
No
Defective ignition
control
Remove blockage
Are there
blockages at air
inlet of heater?
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes