Owner's manual

TRADESMAN ULTRA HEATER
19
Problem
LED Flashing
Is air proving
switch shorted?
(Check continuity on
air proving switch in
open and closed
positions).
Yes
If air proving switch is jumered, remove jumper and retest. If switch exhibits short, replace the switch.
One Time Air proving switch contacts are closed before fan motor starts. \.
Is air proving switch
stuck closed?
Check continuity.
Is air proving switch
binding?
Repair.
No
No
Replace air proving switch
Yes
Yes