Manual

22
Problem LED Flashing
One Time
Air proving switch contacts are closed before fan motor is started. Flash pattern begins immediately, fan does not run. heater does not light.
Is air-
proving switch
shorted? (Perform
continuity check on air-
proving switch.)
Yes
No
Yes
Replace air-proving switch
Rapid Flash
Reverse polarity. Have electrician check neutral and hot wire connections at outlet that heater is connected to. Ensure wiring to ignition control is correct. If all is good, replace igntion control module
Long Flash Two seconds on, two seconds off repetitively for 15 minutes.
Heater has attempted two ignition trials. Heater is in a 15 minute wait period before attempting its third (final) trial for ignition. If ignition is not achieved after the third trial, the heater will lock out and the ignition control module will provide the three flash pattern. Either shut the heater off and then turn on, or wait for the heater to retry the third ignition trial.
Is air-proving switch
arm or paddle binding
on housing? Is there
an obstruction in
heater outlet?
Repair and/or remove obstructions. check for damaged fan housing. Clean or repair as needed.